7 6 5 4 3 2 1 =9,

春天畅想2022-10-04 11:39:544条回答

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冰冰病兵 共回答了19个问题 | 采纳率94.7%
(7+6+5-4-3-2)*1=9
这个题应该有多种答案
1年前
beimuran2005 共回答了1个问题 | 采纳率
7+6+5-4-3-2×1=9
1年前
一个土豆 共回答了15个问题 | 采纳率
7+6+5-4-3-2+1=9
1年前
emasilt8c 共回答了384个问题 | 采纳率
7+6+5-4-3-2*1=9
1年前

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1 2 3 4 5=1 1 2 3 4 5 6=1 1 2 3 4 5 6 7=1 1 2 3 4 5 6 7 8=1 选用适当的运算符号或括号,连接成为等式
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(1+2+3+4)÷5=1?
这数是怎么算的?
{(1+2)÷3+4}÷5=1
其实楼主的题目是不是
1 2 3 4 5=1
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呢?
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3/4+1/7= 25/28
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1+3=2² 1+3+5=3² 1+3+5+7=4²
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(1+2)+3+4+5-6-7+8-9 = 1
(1+2)+3+4-5+6+7-8-9 = 1
(1+2)+3+4*5-6*7+8+9 = 1
(1+2)+3-4-5-6-7+8+9 = 1
(1+2)+3*4*5/6*7-8*9 = 1
(1+2)-3+4-5-6+7-8+9 = 1
(1+2)-3-4+5+6-7-8+9 = 1
(1+2)-3-4+5-6+7+8-9 = 1
(1+2)-3*4*5/6+7-8+9 = 1
(1+2)-3/4-5-6*7/8+9 = 1
(1+2)*3-4*5+6+7+8-9 = 1
(1+2)*3*4+5*6+7-8*9 = 1
(1+2)*3*4+5*6-7*8-9 = 1
(1+2)*3*4-5+6*7-8*9 = 1
(1+2)*3*4-5-6-7-8-9 = 1
(1+2)*3/4-5-6*7/8+9 = 1
(1+2)/3*4-5-6+7-8+9 = 1
(1-2)+3+4-5+6-7-8+9 = 1
(1-2)+3+4-5-6+7+8-9 = 1
(1-2)+3-4+5+6-7+8-9 = 1
(1-2)+3*4*5/6-7+8-9 = 1
(1-2)+3/4+5+6*7/8-9 = 1
(1-2)-3+4+5+6+7-8-9 = 1
(1-2)-3-4+5-6-7+8+9 = 1
(1-2)-3-4-5+6+7-8+9 = 1
(1-2)-3-4*5+6*7-8-9 = 1
(1-2)-3*4*5/6*7+8*9 = 1
(1-2)*3+4*5-6+7-8-9 = 1
(1-2)*3*4-5-6+7+8+9 = 1
(1*2)+3-4*5+6-7+8+9 = 1
(1*2)+3*4+5+6-7-8-9 = 1
(1*2)-3+4*5+6-7-8-9 = 1
(1*2)-3-4+5*6-7-8-9 = 1
(1*2)-3*4-5+6-7+8+9 = 1
(1*2)-3*4*5+6*7+8+9 = 1
(1*2)-3*4*5-6+7*8+9 = 1
(1*2)-3*4*5-6-7+8*9 = 1
(1*2)*3+4+5-6-7+8-9 = 1
(1*2)*3+4-5+6+7-8-9 = 1
(1*2)*3+4*5-6*7+8+9 = 1
(1*2)*3-4-5-6-7+8+9 = 1
(1*2)*3*4-5+6-7-8-9 = 1
(1/2)-3/4+5+6*7/8-9 = 1
(1/2)*3*4-5+6-7-8+9 = 1
(1/2)*3*4-5-6+7+8-9 = 1
1+(2+3)+4+5-6-7+8-9 = 1
1+(2+3)+4-5+6+7-8-9 = 1
1+(2+3)+4*5-6*7+8+9 = 1
1+(2+3)-4-5-6-7+8+9 = 1
1+(2+3)*4+5-6*7+8+9 = 1
1+(2+3)*4-5*6-7+8+9 = 1
1+(2+3)*4/5+6+7-8-9 = 1
1+(2+3)*4/5*6-7-8-9 = 1
1+(2+3)/4-5-6*7/8+9 = 1
1+(2-3)+4-5-6+7-8+9 = 1
1+(2-3)-4+5+6-7-8+9 = 1
1+(2-3)-4+5-6+7+8-9 = 1
1+(2*3)-4*5+6+7-8+9 = 1
1+(2*3)*4-5*6+7+8-9 = 1
1+(2/3)/4/5/6/7/8*9 = 1
1-(2+3)+4+5+6+7-8-9 = 1
1-(2+3)-4+5-6-7+8+9 = 1
1-(2+3)-4-5+6+7-8+9 = 1
1-(2+3)-4*5+6*7-8-9 = 1
1-(2+3)*4+5*6+7-8-9 = 1
1-(2+3)*4-5+6*7-8-9 = 1
1-(2+3)*4/5-6-7+8+9 = 1
1-(2+3)*4/5*6+7+8+9 = 1
1-(2+3)/4+5+6*7/8-9 = 1
1-(2-3)+4-5+6-7-8+9 = 1
1-(2-3)+4-5-6+7+8-9 = 1
1-(2-3)-4+5+6-7+8-9 = 1
1-(2*3)+4*5-6-7+8-9 = 1
1-(2*3)*4+5*6-7-8+9 = 1
1-(2/3)/4/5/6/7/8*9 = 1
1*(2+3)-4*5+6-7+8+9 = 1
1*(2+3)*4-5-6-7+8-9 = 1
1*(2-3)+4*5+6-7-8-9 = 1
1*(2-3)-4+5*6-7-8-9 = 1
1*(2-3)*4+5+6-7-8+9 = 1
1*(2-3)*4+5-6+7+8-9 = 1
1*(2-3)/4+5+6*7/8-9 = 1
1*(2*3)+4+5-6-7+8-9 = 1
1*(2*3)+4-5+6+7-8-9 = 1
1*(2*3)+4*5-6*7+8+9 = 1
1*(2*3)-4-5-6-7+8+9 = 1
1*(2*3)*4-5+6-7-8-9 = 1
1/(2+3)+4/5+6-7-8+9 = 1
1/(2+3)+4/5-6+7+8-9 = 1
1/(2-3)+4*5+6-7-8-9 = 1
1/(2-3)-4+5*6-7-8-9 = 1
1/(2-3)*4+5+6-7-8+9 = 1
1/(2-3)*4+5-6+7+8-9 = 1
1/(2-3)/4+5+6*7/8-9 = 1
1/(2/3)*4-5+6-7-8+9 = 1
1/(2/3)*4-5-6+7+8-9 = 1
1+2+(3+4)+5-6-7+8-9 = 1
1+2+(3+4)-5+6+7-8-9 = 1
1+2+(3-4)-5-6-7+8+9 = 1
1+2+(3*4)*5/6*7-8*9 = 1
1+2-(3+4)+5+6-7-8+9 = 1
1+2-(3+4)+5-6+7+8-9 = 1
1+2-(3-4)-5-6+7-8+9 = 1
1+2-(3*4)*5/6+7-8+9 = 1
1+2-(3/4)-5-6*7/8+9 = 1
1+2*(3*4)-5*6+7+8-9 = 1
1+2/(3*4)/5/6/7/8*9 = 1
1-2+(3+4)-5+6-7-8+9 = 1
1-2+(3+4)-5-6+7+8-9 = 1
1-2+(3-4)+5+6-7+8-9 = 1
1-2+(3*4)*5/6-7+8-9 = 1
1-2+(3/4)+5+6*7/8-9 = 1
1-2-(3+4)+5-6-7+8+9 = 1
1-2-(3+4)-5+6+7-8+9 = 1
1-2-(3-4)+5+6+7-8-9 = 1
1-2-(3*4)*5/6*7+8*9 = 1
1-2*(3*4)+5*6-7-8+9 = 1
1-2/(3*4)/5/6/7/8*9 = 1
1*2+(3-4)*5-6-7+8+9 = 1
1*2+(3*4)+5+6-7-8-9 = 1
1*2-(3+4)+5*6-7-8-9 = 1
1*2-(3*4)-5+6-7+8+9 = 1
1*2-(3*4)*5+6*7+8+9 = 1
1*2-(3*4)*5-6+7*8+9 = 1
1*2-(3*4)*5-6-7+8*9 = 1
1*2*(3+4)+5+6-7-8-9 = 1
1*2*(3-4)+5+6-7+8-9 = 1
1*2*(3*4)-5+6-7-8-9 = 1
1*2/(3-4)+5+6-7+8-9 = 1
1/2-(3/4)+5+6*7/8-9 = 1
1/2*(3*4)-5+6-7-8+9 = 1
1/2*(3*4)-5-6+7+8-9 = 1
1+2+3+(4+5)-6-7+8-9 = 1
1+2+3+(4-5)+6+7-8-9 = 1
1+2+3+(4*5)-6*7+8+9 = 1
1+2+3-(4+5)-6-7+8+9 = 1
1+2+3*(4*5)/6*7-8*9 = 1
1+2-3+(4-5)-6+7-8+9 = 1
1+2-3-(4-5)+6-7-8+9 = 1
1+2-3-(4-5)-6+7+8-9 = 1
1+2-3*(4+5)+6*7-8-9 = 1
1+2-3*(4*5)/6+7-8+9 = 1
1+2*3-(4*5)+6+7-8+9 = 1
1+2/3/(4*5)/6/7/8*9 = 1
1-2+3+(4-5)+6-7-8+9 = 1
1-2+3+(4-5)-6+7+8-9 = 1
1-2+3-(4-5)+6-7+8-9 = 1
1-2+3*(4+5)-6*7+8+9 = 1
1-2+3*(4*5)/6-7+8-9 = 1
1-2-3+(4+5)+6+7-8-9 = 1
1-2-3-(4+5)+6+7-8+9 = 1
1-2-3-(4-5)-6-7+8+9 = 1
1-2-3-(4*5)+6*7-8-9 = 1
1-2-3*(4*5)/6*7+8*9 = 1
1-2*3+(4*5)-6-7+8-9 = 1
1-2/3/(4*5)/6/7/8*9 = 1
1*2+3-(4-5)*6+7-8-9 = 1
1*2+3-(4*5)+6-7+8+9 = 1
1*2+3*(4-5)-6+7-8+9 = 1
1*2+3/(4-5)-6+7-8+9 = 1
1*2-3+(4-5)*6+7-8+9 = 1
1*2-3+(4*5)+6-7-8-9 = 1
1*2-3*(4-5)+6+7-8-9 = 1
1*2-3*(4*5)+6*7+8+9 = 1
1*2-3*(4*5)-6+7*8+9 = 1
1*2-3*(4*5)-6-7+8*9 = 1
1*2-3/(4-5)+6+7-8-9 = 1
1*2*3+(4+5)-6-7+8-9 = 1
1*2*3+(4-5)+6+7-8-9 = 1
1*2*3+(4*5)-6*7+8+9 = 1
1*2*3-(4+5)-6-7+8+9 = 1
1*2*3*(4+5)-6-7*8+9 = 1
1*2*3*(4+5)/6-7+8-9 = 1
1/2-3/(4+5)/6*7+8/9 = 1
1/2*3*(4-5)*6-7+8+9 = 1
1/2*3/(4-5)*6-7+8+9 = 1
1/2/3*(4+5)*6-7+8-9 = 1
1+2+3+4+(5-6)-7+8-9 = 1
1+2+3+4-(5-6)+7-8-9 = 1
1+2+3-4-(5+6)-7+8+9 = 1
1+2+3*4*(5-6)-7+8+9 = 1
1+2+3*4*(5/6)*7-8*9 = 1
1+2+3*4/(5-6)-7+8+9 = 1
1+2-3+4-(5+6)+7-8+9 = 1
1+2-3-4+(5+6)-7-8+9 = 1
1+2-3-4+(5+6)*7-8*9 = 1
1+2-3-4+(5-6)+7+8-9 = 1
1+2-3*4+(5-6)*7+8+9 = 1
1+2-3*4*(5/6)+7-8+9 = 1
1+2*3+4-(5-6)*7-8-9 = 1
1+2*3-4*(5-6)+7-8-9 = 1
1+2*3-4/(5-6)+7-8-9 = 1
1+2*3*4+(5-6)*7-8-9 = 1
1+2*3*4-(5*6)+7+8-9 = 1
1+2*3*4*(5-6)+7+8+9 = 1
1+2*3*4/(5-6)+7+8+9 = 1
1+2/3/4/(5*6)/7/8*9 = 1
1-2+3+4-(5+6)+7+8-9 = 1
1-2+3+4-(5+6)*7+8*9 = 1
1-2+3+4-(5-6)-7-8+9 = 1
1-2+3-4+(5+6)-7+8-9 = 1
1-2+3*4-(5-6)*7-8-9 = 1
1-2+3*4*(5/6)-7+8-9 = 1
1-2-3+4+(5+6)+7-8-9 = 1
1-2-3-4+(5-6)-7+8+9 = 1
1-2-3-4-(5-6)+7-8+9 = 1
1-2-3*4*(5-6)+7-8-9 = 1
1-2-3*4*(5/6)*7+8*9 = 1
1-2-3*4/(5-6)+7-8-9 = 1
1-2*3+4*(5-6)-7+8+9 = 1
1-2*3+4/(5-6)-7+8+9 = 1
1-2*3-4+(5-6)*7+8+9 = 1
1-2*3*4+(5*6)-7-8+9 = 1
1-2*3*4-(5-6)*7+8+9 = 1
1-2*3*4*(5-6)-7-8-9 = 1
1-2*3*4/(5-6)-7-8-9 = 1
1-2/3/4/(5*6)/7/8*9 = 1
1*2+3+4+(5-6)*7+8-9 = 1
1*2+3-4*(5-6)-7+8-9 = 1
1*2+3-4/(5-6)-7+8-9 = 1
1*2+3*4+(5+6)-7-8-9 = 1
1*2-3+4*(5-6)+7+8-9 = 1
1*2-3+4/(5-6)+7+8-9 = 1
1*2-3-4+(5*6)-7-8-9 = 1
1*2-3-4-(5-6)*7+8-9 = 1
1*2-3*4-(5-6)-7+8+9 = 1
1*2*3+4+(5-6)-7+8-9 = 1
1*2*3+4-(5-6)+7-8-9 = 1
1*2*3-4-(5+6)-7+8+9 = 1
1*2*3*4-(5-6)-7-8-9 = 1
1/2*3*4-(5+6)+7+8-9 = 1
1/2*3*4-(5+6)*7+8*9 = 1
1/2*3*4-(5-6)-7-8+9 = 1
1/2*3*4*(5+6)+7-8*9 = 1
1/2*3*4*(5+6)-7*8-9 = 1
1/2*3/4+(5+6)*7/8-9 = 1
1+2+3+4+5-(6+7)+8-9 = 1
1+2+3+4-5+(6+7)-8-9 = 1
1+2+3+4*5-(6*7)+8+9 = 1
1+2+3-4-5-(6+7)+8+9 = 1
1+2+3*4*5/(6/7)-8*9 = 1
1+2-3+4-5-(6-7)-8+9 = 1
1+2-3-4+5+(6-7)-8+9 = 1
1+2-3-4+5-(6-7)+8-9 = 1
1+2-3/4-5-(6*7)/8+9 = 1
1+2*3-4*5+(6+7)-8+9 = 1
1+2/3/4/5/(6*7)/8*9 = 1
1-2+3+4-5+(6-7)-8+9 = 1
1-2+3+4-5-(6-7)+8-9 = 1
1-2+3-4+5+(6-7)+8-9 = 1
1-2+3/4+5+(6*7)/8-9 = 1
1-2-3+4+5+(6+7)-8-9 = 1
1-2-3-4+5-(6+7)+8+9 = 1
1-2-3-4-5+(6+7)-8+9 = 1
1-2-3-4*5+(6*7)-8-9 = 1
1-2-3*4*5/(6/7)+8*9 = 1
1-2*3+4*5-(6+7)+8-9 = 1
1-2/3/4/5/(6*7)/8*9 = 1
1*2+3-4*5+(6-7)+8+9 = 1
1*2+3*4+5+(6-7)-8-9 = 1
1*2-3+4*5+(6-7)-8-9 = 1
1*2-3-4+5+(6-7)*8+9 = 1
1*2-3-4-5*(6-7)-8+9 = 1
1*2-3-4-5/(6-7)-8+9 = 1
1*2-3*4-5+(6-7)+8+9 = 1
1*2-3*4*5+(6*7)+8+9 = 1
1*2-3*4*5-(6+7)+8*9 = 1
1*2*3+4+5-(6+7)+8-9 = 1
1*2*3+4-5+(6+7)-8-9 = 1
1*2*3+4*5-(6*7)+8+9 = 1
1*2*3-4-5-(6+7)+8+9 = 1
1*2*3*4-5+(6-7)-8-9 = 1
1/2-3/4+5+(6*7)/8-9 = 1
1/2*3*4-5+(6-7)-8+9 = 1
1/2*3*4-5-(6-7)+8-9 = 1
1+2+3+4+5-6-(7-8)-9 = 1
1+2+3+4-5+6+(7-8)-9 = 1
1+2+3-4-5-6-(7-8)+9 = 1
1+2+3-4*5+6-(7-8)*9 = 1
1+2+3-4*5-6*(7-8)+9 = 1
1+2+3-4*5-6/(7-8)+9 = 1
1+2+3-4*5/6-(7+8)/9 = 1
1+2-3+4-5-6+(7-8)+9 = 1
1+2-3-4+5+6-(7+8)+9 = 1
1+2-3-4+5-6+(7+8)-9 = 1
1+2-3-4-5+6*(7+8)/9 = 1
1+2-3-4*5*6/(7+8)+9 = 1
1+2-3*4-5+6-(7-8)*9 = 1
1+2-3*4-5-6*(7-8)+9 = 1
1+2-3*4-5-6/(7-8)+9 = 1
1+2-3*4*5/6+(7-8)+9 = 1
1+2-3/4-5-6*(7/8)+9 = 1
1+2*3+4+5+6*(7-8)-9 = 1
1+2*3+4+5+6/(7-8)-9 = 1
1+2*3+4+5-6+(7-8)*9 = 1
1+2*3-4-5+6*(7-8)+9 = 1
1+2*3-4-5+6/(7-8)+9 = 1
1+2*3-4-5-6-(7-8)*9 = 1
1+2*3-4*5+6+(7-8)+9 = 1
1+2*3*4-5*6+(7+8)-9 = 1
1+2/3*4+5-6-(7+8)/9 = 1
1+2/3/4/5/6/(7*8)*9 = 1
1-2+3+4+5-6*(7+8)/9 = 1
1-2+3+4-5+6-(7+8)+9 = 1
1-2+3+4-5-6+(7+8)-9 = 1
1-2+3+4*5*6/(7+8)-9 = 1
1-2+3-4+5+6-(7-8)-9 = 1
1-2+3*4+5+6*(7-8)-9 = 1
1-2+3*4+5+6/(7-8)-9 = 1
1-2+3*4+5-6+(7-8)*9 = 1
1-2+3*4*5/6-(7-8)-9 = 1
1-2+3/4+5+6*(7/8)-9 = 1
1-2-3+4+5+6+(7-8)-9 = 1
1-2-3+4*5+6*(7-8)-9 = 1
1-2-3+4*5+6/(7-8)-9 = 1
1-2-3+4*5-6+(7-8)*9 = 1
1-2-3+4*5/6+(7+8)/9 = 1
1-2-3-4+5-6-(7-8)+9 = 1
1-2-3-4-5+6+(7-8)+9 = 1
1-2*3+4+5+6+(7-8)*9 = 1
1-2*3+4+5-6*(7-8)-9 = 1
1-2*3+4+5-6/(7-8)-9 = 1
1-2*3+4*5-6-(7-8)-9 = 1
1-2*3-4-5+6-(7-8)*9 = 1
1-2*3-4-5-6*(7-8)+9 = 1
1-2*3-4-5-6/(7-8)+9 = 1
1-2*3*4+5*6-(7+8)+9 = 1
1-2/3+4+5*6*(7-8)/9 = 1
1-2/3+4+5*6/(7-8)/9 = 1
1-2/3*4-5+6+(7+8)/9 = 1
1-2/3/4/5/6/(7*8)*9 = 1
1*2+3+4-5+6+(7-8)*9 = 1
1*2+3+4-5-6*(7-8)-9 = 1
1*2+3+4-5-6/(7-8)-9 = 1
1*2+3-4*5+6-(7-8)+9 = 1
1*2+3*4+5+6-(7+8)-9 = 1
1*2+3*4*5/6*(7-8)+9 = 1
1*2+3*4*5/6/(7-8)+9 = 1
1*2-3+4-5+6*(7-8)+9 = 1
1*2-3+4-5+6/(7-8)+9 = 1
1*2-3+4-5-6-(7-8)*9 = 1
1*2-3+4*5+6-(7+8)-9 = 1
1*2-3+4*5/6/(7+8)*9 = 1
1*2-3-4+5*6-(7+8)-9 = 1
1*2-3*4+5*6/(7+8)+9 = 1
1*2-3*4-5+6-(7-8)+9 = 1
1*2-3*4*5-6+(7*8)+9 = 1
1*2-3*4*5/6-(7-8)*9 = 1
1*2*3+4+5-6-(7-8)-9 = 1
1*2*3+4-5+6+(7-8)-9 = 1
1*2*3-4-5-6-(7-8)+9 = 1
1*2*3-4*5+6-(7-8)*9 = 1
1*2*3-4*5-6*(7-8)+9 = 1
1*2*3-4*5-6/(7-8)+9 = 1
1*2*3-4*5/6-(7+8)/9 = 1
1*2*3*4-5+6-(7+8)-9 = 1
1*2*3/4-5/6/(7+8)*9 = 1
1*2/3-4+5+6*(7-8)/9 = 1
1*2/3-4+5+6/(7-8)/9 = 1
1*2/3/4-5/6+(7+8)/9 = 1
1/2-3+4-5/6/(7+8)*9 = 1
1/2-3-4-5/6*(7-8)*9 = 1
1/2-3-4-5/6/(7-8)*9 = 1
1/2-3/4+5+6*(7/8)-9 = 1
1/2*3-4+5/6*(7+8)-9 = 1
1/2*3*4+5-6*(7+8)/9 = 1
1/2*3*4-5+6-(7+8)+9 = 1
1/2*3*4-5-6+(7+8)-9 = 1
1+2+3+4+5-6-7+(8-9) = 1
1+2+3+4-5+6+7-(8+9) = 1
1+2+3+4*5-6*7+(8+9) = 1
1+2+3-4-5-6-7+(8+9) = 1
1+2+3*4*5/6*7-(8*9) = 1
1+2-3+4-5-6+7-(8-9) = 1
1+2-3+4*5*6-7*(8+9) = 1
1+2-3-4+5+6-7-(8-9) = 1
1+2-3-4+5-6+7+(8-9) = 1
1+2-3*4*5/6+7-(8-9) = 1
1+2*3-4*5+6+7-(8-9) = 1
1+2*3*4-5*6+7+(8-9) = 1
1-2+3+4-5+6-7-(8-9) = 1
1-2+3+4-5-6+7+(8-9) = 1
1-2+3-4+5+6-7+(8-9) = 1
1-2+3-4*5*6+7*(8+9) = 1
1-2+3*4*5/6-7+(8-9) = 1
1-2-3+4+5+6+7-(8+9) = 1
1-2-3-4+5-6-7+(8+9) = 1
1-2-3-4-5+6+7-(8-9) = 1
1-2-3-4*5+6*7-(8+9) = 1
1-2-3*4*5/6*7+(8*9) = 1
1-2*3+4*5-6-7+(8-9) = 1
1-2*3*4+5*6-7-(8-9) = 1
1*2+3+4+5-6+7*(8-9) = 1
1*2+3+4+5-6+7/(8-9) = 1
1*2+3-4*5+6-7+(8+9) = 1
1*2+3*4+5+6-7-(8+9) = 1
1*2-3+4*5+6-7-(8+9) = 1
1*2-3-4+5-6-7*(8-9) = 1
1*2-3-4+5-6-7/(8-9) = 1
1*2-3-4+5*6-7-(8+9) = 1
1*2-3*4-5+6-7+(8+9) = 1
1*2-3*4*5+6*7+(8+9) = 1
1*2-3*4*5-6-7+(8*9) = 1
1*2*3+4+5-6-7+(8-9) = 1
1*2*3+4-5+6+7-(8+9) = 1
1*2*3+4*5-6*7+(8+9) = 1
1*2*3-4-5-6-7+(8+9) = 1
1*2*3*4-5+6-7-(8+9) = 1
1*2*3*4-5*6-7*(8-9) = 1
1*2*3*4-5*6-7/(8-9) = 1
1/2*3*4-5+6-7-(8-9) = 1
1/2*3*4-5-6+7+(8-9) = 1
(1+(2+3))+4+5-6-7+8-9 = 1
(1+(2+3))+4-5+6+7-8-9 = 1
(1+(2+3))+4*5-6*7+8+9 = 1
(1+(2+3))-4-5-6-7+8+9 = 1
(1+(2+3))*4-5+6-7-8-9 = 1
(1+(2-3))+4-5-6+7-8+9 = 1
(1+(2-3))-4+5+6-7-8+9 = 1
(1+(2-3))-4+5-6+7+8-9 = 1
(1+(2-3))*4+5+6+7-8-9 = 1
(1+(2-3))*4*5*6*7-8+9 = 1
(1+(2-3))*4*5*6/7-8+9 = 1
(1+(2-3))*4*5/6*7-8+9 = 1
(1+(2-3))*4*5/6/7-8+9 = 1
(1+(2-3))*4/5*6*7-8+9 = 1
(1+(2-3))*4/5*6/7-8+9 = 1
(1+(2-3))*4/5/6*7-8+9 = 1
(1+(2-3))*4/5/6/7-8+9 = 1
(1+(2-3))/4+5+6+7-8-9 = 1
(1+(2-3))/4*5*6*7-8+9 = 1
(1+(2-3))/4*5*6/7-8+9 = 1
(1+(2-3))/4*5/6*7-8+9 = 1
(1+(2-3))/4*5/6/7-8+9 = 1
(1+(2-3))/4/5*6*7-8+9 = 1
(1+(2-3))/4/5*6/7-8+9 = 1
(1+(2-3))/4/5/6*7-8+9 = 1
(1+(2-3))/4/5/6/7-8+9 = 1
(1+(2*3))-4*5+6+7-8+9 = 1
(1-(2+3))+4+5+6+7-8-9 = 1
(1-(2+3))-4+5-6-7+8+9 = 1
(1-(2+3))-4-5+6+7-8+9 = 1
(1-(2+3))-4*5+6*7-8-9 = 1
(1-(2+3))*4+5+6+7+8-9 = 1
(1-(2+3))*4-5*6+7*8-9 = 1
(1-(2-3))+4-5+6-7-8+9 = 1
(1-(2-3))+4-5-6+7+8-9 = 1
(1-(2-3))-4+5+6-7+8-9 = 1
(1-(2-3))*4+5-6-7-8+9 = 1
(1-(2-3))*4-5+6-7+8-9 = 1
(1-(2*3))+4*5-6-7+8-9 = 1
(1-(2*3))*4+5+6-7+8+9 = 1
(1*(2+3))-4*5+6-7+8+9 = 1
(1*(2+3))*4-5-6-7+8-9 = 1
(1*(2-3))+4*5+6-7-8-9 = 1
(1*(2-3))-4+5*6-7-8-9 = 1
(1*(2-3))*4+5+6-7-8+9 = 1
(1*(2-3))*4+5-6+7+8-9 = 1
(1*(2-3))/4+5+6*7/8-9 = 1
(1*(2*3))+4+5-6-7+8-9 = 1
(1*(2*3))+4-5+6+7-8-9 = 1
(1*(2*3))+4*5-6*7+8+9 = 1
(1*(2*3))-4-5-6-7+8+9 = 1
(1*(2*3))*4-5+6-7-8-9 = 1
(1/(2+3))+4/5+6-7-8+9 = 1
(1/(2+3))+4/5-6+7+8-9 = 1
(1/(2-3))+4*5+6-7-8-9 = 1
(1/(2-3))-4+5*6-7-8-9 = 1
(1/(2-3))*4+5+6-7-8+9 = 1
(1/(2-3))*4+5-6+7+8-9 = 1
(1/(2-3))/4+5+6*7/8-9 = 1
(1/(2/3))*4-5+6-7-8+9 = 1
(1/(2/3))*4-5-6+7+8-9 = 1
(1+2)+(3+4)+5-6-7+8-9 = 1
(1+2)+(3+4)-5+6+7-8-9 = 1
(1+2)+(3-4)-5-6-7+8+9 = 1
(1+2)+(3*4)*5/6*7-8*9 = 1
(1+2)-(3+4)+5+6-7-8+9 = 1
(1+2)-(3+4)+5-6+7+8-9 = 1
(1+2)-(3-4)-5-6+7-8+9 = 1
(1+2)-(3*4)*5/6+7-8+9 = 1
(1+2)-(3/4)-5-6*7/8+9 = 1
(1+2)*(3+4)+5-6*7+8+9 = 1
(1+2)*(3+4)-5*6-7+8+9 = 1
(1+2)*(3-4)*5+6-7+8+9 = 1
(1+2)*(3*4)+5*6+7-8*9 = 1
(1+2)*(3*4)+5*6-7*8-9 = 1
(1+2)*(3*4)-5+6*7-8*9 = 1
(1+2)*(3*4)-5-6-7-8-9 = 1
(1+2)*(3/4)-5-6*7/8+9 = 1
(1+2)/(3-4)*5+6-7+8+9 = 1
(1+2)/(3/4)-5-6+7-8+9 = 1
(1-2)+(3+4)-5+6-7-8+9 = 1
(1-2)+(3+4)-5-6+7+8-9 = 1
(1-2)+(3-4)+5+6-7+8-9 = 1
(1-2)+(3*4)*5/6-7+8-9 = 1
(1-2)+(3/4)+5+6*7/8-9 = 1
(1-2)-(3+4)+5-6-7+8+9 = 1
(1-2)-(3+4)-5+6+7-8+9 = 1
(1-2)-(3-4)+5+6+7-8-9 = 1
(1-2)-(3*4)*5/6*7+8*9 = 1
(1-2)*(3*4)-5-6+7+8+9 = 1
(1*2)+(3-4)*5-6-7+8+9 = 1
(1*2)+(3*4)+5+6-7-8-9 = 1
(1*2)-(3+4)+5*6-7-8-9 = 1
(1*2)-(3*4)-5+6-7+8+9 = 1
(1*2)-(3*4)*5+6*7+8+9 = 1
(1*2)-(3*4)*5-6+7*8+9 = 1
(1*2)-(3*4)*5-6-7+8*9 = 1
(1*2)*(3+4)+5+6-7-8-9 = 1
(1*2)*(3-4)+5+6-7+8-9 = 1
(1*2)*(3*4)-5+6-7-8-9 = 1
(1*2)/(3-4)+5+6-7+8-9 = 1
(1/2)-(3/4)+5+6*7/8-9 = 1
(1/2)*(3*4)-5+6-7-8+9 = 1
(1/2)*(3*4)-5-6+7+8-9 = 1
(1+2)+3+(4+5)-6-7+8-9 = 1
(1+2)+3+(4-5)+6+7-8-9 = 1
(1+2)+3+(4*5)-6*7+8+9 = 1
(1+2)+3-(4+5)-6-7+8+9 = 1
(1+2)+3*(4*5)/6*7-8*9 = 1
(1+2)-3+(4-5)-6+7-8+9 = 1
(1+2)-3-(4-5)+6-7-8+9 = 1
(1+2)-3-(4-5)-6+7+8-9 = 1
(1+2)-3*(4+5)+6*7-8-9 = 1
(1+2)-3*(4*5)/6+7-8+9 = 1
(1+2)*3-(4*5)+6+7+8-9 = 1
(1+2)*3/(4+5)+6-7-8+9 = 1
(1+2)*3/(4+5)-6+7+8-9 = 1
(1+2)/3+(4-5)*6+7+8-9 = 1
(1+2)/3-(4-5)*6-7-8+9 = 1
(1+2)/3*(4-5)-6+7-8+9 = 1
(1+2)/3/(4-5)-6+7-8+9 = 1
(1-2)+3+(4-5)+6-7-8+9 = 1
(1-2)+3+(4-5)-6+7+8-9 = 1
(1-2)+3-(4-5)+6-7+8-9 = 1
(1-2)+3*(4+5)-6*7+8+9 = 1
(1-2)+3*(4*5)/6-7+8-9 = 1
(1-2)-3+(4+5)+6+7-8-9 = 1
(1-2)-3-(4+5)+6+7-8+9 = 1
(1-2)-3-(4-5)-6-7+8+9 = 1
(1-2)-3-(4*5)+6*7-8-9 = 1
(1-2)-3*(4*5)/6*7+8*9 = 1
(1-2)*3+(4-5)*6-7+8+9 = 1
(1-2)*3+(4*5)-6+7-8-9 = 1
(1-2)/3*(4+5)-6-7+8+9 = 1
(1*2)+3-(4-5)*6+7-8-9 = 1
(1*2)+3-(4*5)+6-7+8+9 = 1
(1*2)+3*(4-5)-6+7-8+9 = 1
(1*2)+3/(4-5)-6+7-8+9 = 1
(1*2)-3+(4-5)*6+7-8+9 = 1
(1*2)-3+(4*5)+6-7-8-9 = 1
(1*2)-3*(4-5)+6+7-8-9 = 1
(1*2)-3*(4*5)+6*7+8+9 = 1
(1*2)-3*(4*5)-6+7*8+9 = 1
(1*2)-3*(4*5)-6-7+8*9 = 1
(1*2)-3/(4-5)+6+7-8-9 = 1
(1*2)*3+(4+5)-6-7+8-9 = 1
(1*2)*3+(4-5)+6+7-8-9 = 1
(1*2)*3+(4*5)-6*7+8+9 = 1
(1*2)*3-(4+5)-6-7+8+9 = 1
(1*2)*3*(4+5)-6-7*8+9 = 1
(1*2)*3*(4+5)/6-7+8-9 = 1
(1/2)-3/(4+5)/6*7+8/9 = 1
(1/2)*3*(4-5)*6-7+8+9 = 1
(1/2)*3/(4-5)*6-7+8+9 = 1
(1/2)/3*(4+5)*6-7+8-9 = 1
(1+2)+3+4+(5-6)-7+8-9 = 1
(1+2)+3+4-(5-6)+7-8-9 = 1
(1+2)+3-4-(5+6)-7+8+9 = 1
(1+2)+3*4*(5-6)-7+8+9 = 1
(1+2)+3*4*(5/6)*7-8*9 = 1
(1+2)+3*4/(5-6)-7+8+9 = 1
(1+2)-3+4-(5+6)+7-8+9 = 1
(1+2)-3-4+(5+6)-7-8+9 = 1
(1+2)-3-4+(5+6)*7-8*9 = 1
(1+2)-3-4+(5-6)+7+8-9 = 1
(1+2)-3*4+(5-6)*7+8+9 = 1
(1+2)-3*4*(5/6)+7-8+9 = 1
(1+2)*3*4+(5*6)+7-8*9 = 1
(1+2)*3*4+(5*6)-7*8-9 = 1
(1+2)*3*4-(5+6)-7-8-9 = 1
(1+2)/3*4-(5+6)+7-8+9 = 1
(1-2)+3+4-(5+6)+7+8-9 = 1
(1-2)+3+4-(5+6)*7+8*9 = 1
(1-2)+3+4-(5-6)-7-8+9 = 1
(1-2)+3-4+(5+6)-7+8-9 = 1
(1-2)+3*4-(5-6)*7-8-9 = 1
(1-2)+3*4*(5/6)-7+8-9 = 1
(1-2)-3+4+(5+6)+7-8-9 = 1
(1-2)-3-4+(5-6)-7+8+9 = 1
(1-2)-3-4-(5-6)+7-8+9 = 1
(1-2)-3*4*(5-6)+7-8-9 = 1
(1-2)-3*4*(5/6)*7+8*9 = 1
(1-2)-3*4/(5-6)+7-8-9 = 1
(1-2)*3+4*(5-6)+7-8+9 = 1
(1-2)*3+4/(5-6)+7-8+9 = 1
(1-2)*3-4-(5-6)*7-8+9 = 1
(1-2)*3*4-(5+6)+7+8+9 = 1
(1*2)+3+4+(5-6)*7+8-9 = 1
(1*2)+3-4*(5-6)-7+8-9 = 1
(1*2)+3-4/(5-6)-7+8-9 = 1
(1*2)+3*4+(5+6)-7-8-9 = 1
(1*2)-3+4*(5-6)+7+8-9 = 1
(1*2)-3+4/(5-6)+7+8-9 = 1
(1*2)-3-4+(5*6)-7-8-9 = 1
(1*2)-3-4-(5-6)*7+8-9 = 1
(1*2)-3*4-(5-6)-7+8+9 = 1
(1*2)*3+4+(5-6)-7+8-9 = 1
(1*2)*3+4-(5-6)+7-8-9 = 1
(1*2)*3-4-(5+6)-7+8+9 = 1
(1*2)*3*4-(5-6)-7-8-9 = 1
(1/2)*3*4-(5+6)+7+8-9 = 1
(1/2)*3*4-(5+6)*7+8*9 = 1
(1/2)*3*4-(5-6)-7-8+9 = 1
(1/2)*3*4*(5+6)+7-8*9 = 1
(1/2)*3*4*(5+6)-7*8-9 = 1
(1/2)*3/4+(5+6)*7/8-9 = 1
(1+2)+3+4+5-(6+7)+8-9 = 1
(1+2)+3+4-5+(6+7)-8-9 = 1
(1+2)+3+4*5-(6*7)+8+9 = 1
(1+2)+3-4-5-(6+7)+8+9 = 1
(1+2)+3*4*5/(6/7)-8*9 = 1
(1+2)-3+4-5-(6-7)-8+9 = 1
(1+2)-3-4+5+(6-7)-8+9 = 1
(1+2)-3-4+5-(6-7)+8-9 = 1
(1+2)-3/4-5-(6*7)/8+9 = 1
(1+2)*3+4+5+(6-7)*8-9 = 1
(1+2)*3+4-5*(6-7)-8-9 = 1
(1+2)*3+4-5/(6-7)-8-9 = 1
(1+2)*3-4+5*(6-7)-8+9 = 1
(1+2)*3-4+5/(6-7)-8+9 = 1
(1+2)*3-4-5+(6-7)*8+9 = 1
(1+2)*3-4*5+(6+7)+8-9 = 1
(1+2)*3*4-5+(6*7)-8*9 = 1
(1+2)*3*4-5-(6+7)-8-9 = 1
(1+2)*3/4-5-(6*7)/8+9 = 1
(1+2)/3+4+5*(6-7)-8+9 = 1
(1+2)/3+4+5/(6-7)-8+9 = 1
(1+2)/3+4-5+(6-7)*8+9 = 1
(1+2)/3-4+5-(6-7)*8-9 = 1
(1+2)/3-4-5*(6-7)+8-9 = 1
(1+2)/3-4-5/(6-7)+8-9 = 1
(1+2)/3*4-5-(6-7)-8+9 = 1
(1-2)+3+4-5+(6-7)-8+9 = 1
(1-2)+3+4-5-(6-7)+8-9 = 1
(1-2)+3-4+5+(6-7)+8-9 = 1
(1-2)+3/4+5+(6*7)/8-9 = 1
(1-2)-3+4+5+(6+7)-8-9 = 1
(1-2)-3-4+5-(6+7)+8+9 = 1
(1-2)-3-4-5+(6+7)-8+9 = 1
(1-2)-3-4*5+(6*7)-8-9 = 1
(1-2)-3*4*5/(6/7)+8*9 = 1
(1-2)*3+4*5-(6-7)-8-9 = 1
(1-2)*3*4-5-(6-7)+8+9 = 1
(1*2)+3-4*5+(6-7)+8+9 = 1
(1*2)+3*4+5+(6-7)-8-9 = 1
(1*2)-3+4*5+(6-7)-8-9 = 1
(1*2)-3-4+5+(6-7)*8+9 = 1
(1*2)-3-4-5*(6-7)-8+9 = 1
(1*2)-3-4-5/(6-7)-8+9 = 1
(1*2)-3*4-5+(6-7)+8+9 = 1
(1*2)-3*4*5+(6*7)+8+9 = 1
(1*2)-3*4*5-(6+7)+8*9 = 1
(1*2)*3+4+5-(6+7)+8-9 = 1
(1*2)*3+4-5+(6+7)-8-9 = 1
(1*2)*3+4*5-(6*7)+8+9 = 1
(1*2)*3-4-5-(6+7)+8+9 = 1
(1*2)*3*4-5+(6-7)-8-9 = 1
(1/2)-3/4+5+(6*7)/8-9 = 1
(1/2)*3*4-5+(6-7)-8+9 = 1
(1/2)*3*4-5-(6-7)+8-9 = 1
1 2 3 4 5 6 7 1 2 3 4 5
1 2 3 4 5 6 7 1 2 3 4 5
1 2 3 4 5 6 7
1 2 3 4 5 6 7 =1.填上合适的符号使算或成立
涉世不深8881年前0
共回答了个问题 | 采纳率
2 1 7 6 3 5 8 9 4
2 1 7 6 3 5 8 9 4
4 7 5
9 7
2 4
4 1 2 6
6 1
7 3
8 7 6
3 5 9 4 2 1
shaohuawei1年前0
共回答了个问题 | 采纳率
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
在空白处添+或-号使得数为最小的正数
西红柿土1年前6
nitianweiwo3 共回答了3个问题 | 采纳率
1+2-3+4-5+6-7+8-9
2 3 4 5 6 7
2 3 4 5 6 7

龙塘仔1年前4
金乌鸦计票器 共回答了16个问题 | 采纳率81.3%
2C 小芳和自行车一起运动 故相对静止 .
3A 那条鱼一会在莲叶的南边一会在莲叶的北边 你说谁是参考物?
4C 第四题你以后会学载人飞船是绕地球运动的所以ABD都不对
5 C
6 A
7 AC甲车看到地面上的树木向北运动,所以判定甲车相对于地面向南运动AD都错.所以有两种情况.选A.C
6,7,8,9,
6,7,8,9,

35169651年前1
哈姆大象 共回答了19个问题 | 采纳率89.5%
设需要质量分数为30%盐水的质量为X根据溶液混合前后溶质的质量不变得:20Kg*10%+X*30%=(20Kg+X)*22%X=30Kg设需要质量分数为98%的药液的质量为X根据溶液在稀释前后溶质的质量不变得:2940g*10%=X*98%X=300g设原盐水的...
1/2+1/3+1/4+1/5+1/6+1/7=?
oasis_lee1年前1
yunzliu 共回答了20个问题 | 采纳率80%
1/2=0.5
1/3约=0.3
1/4=0.25
1/5=0.2
1/6约=0.1
1/7约=0.1
0.5+0.3+0.25+0.2+0.1+0.1大于1.5
因为在计算的过程中1/6 1/7 1/3 都取约=
所以在后面的计算中0.5+0.3+0.25+0.2+0.1+0.1会小于实际值
总的答案大于1.5
(5,6,7)
(5,6,7)

江上萎是我儿子1年前3
酷狐 共回答了16个问题 | 采纳率100%





1,2,3,4,5,6,7+1,2,3,4,
写意篮球1年前1
吃馒头也浪漫 共回答了23个问题 | 采纳率78.3%
1.cleaning
2.watching
3.listening
4.reading
5.newspaper
6.using
7.exercising
What are your pen pals doing?
His father is reading newspapers.
Some of my photos are here.
She is eating dinner now
I am swimming with my sister.
2/3+5/2+3/1+8/9+7/3=?
xcKevin1年前1
no-three-no-four 共回答了16个问题 | 采纳率93.8%
3/9
a/7=b/8 a/b=
中蝎毒的瓶子1年前5
戴墨镜的胡子 共回答了14个问题 | 采纳率85.7%
两边同时乘以7再乘以8,以削掉左边的7和右边的8
削掉后就变成了8a=7b
这样两边再同时除以b,就会变成8(a/b)=7
这样 你想要的格式(a/b)就出现了
此时左右同时除以8就可以使左边单独剩下a/b,也就是你想要的解
即a/b=7/8
1+8= 9-6= 7+2= 2+6= 8-5= 4+5= 3+6= 8-3= 4+4= 2+7= 9-5= 9-2=
1+8= 9-6= 7+2= 2+6=
8-5= 4+5= 3+6= 8-3=
4+4= 2+7= 9-5= 9-2=
8-7= 8+1= 5+4= 3+5=
9-4= 5+3= 0+8= 8-6=
zlw9271年前1
ML的N次方 共回答了29个问题 | 采纳率89.7%
9;3;9;8;3;9;9;5;8;9;4;7;1;9;9;8;5;8;8;2
1+2+3+4+5+6+7+8+9
1+2+3+4+5+6+7+8+9
一直加下去加到100等于几?
hemengzhi1年前5
show168 共回答了1个问题 | 采纳率100%
等于5050,1+100=101,2+99=101,以此类推共50组,101x50=5050
1 /5,1/3,3/7,1/2,( )
ggclr1年前1
9exadu 共回答了17个问题 | 采纳率82.4%
5/9
可以看做:1/5,2/6,3/7,4/8,5/9
6+5+8+2+5+7+5/6
yuanxin11011年前1
掘金女粉丝 共回答了30个问题 | 采纳率83.3%
8
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9
A和B 比大小 抽签
抽到一样的A赢 比如抽签 A是4 B是4 那就算A赢
A抽到0=5 B抽到0=0
那A赢B是几率是多少
1楼还是没说明白 A赢B的几率是多少啊 还有A抽到0=5的 别忘了 如果一样还是A赢
kame19831年前3
娃哈哈c337 共回答了25个问题 | 采纳率92%
这是个简单的数数问题,楼上两位搞得那么复杂,还都弄错了.我们只要把所有可能性都列出来就能算出答案了:
A 0 (=5):B 0-5输,6-9赢,合计A赢6,B赢4
A 1:B 0-1输,2-9赢,合计A赢2,B赢8
A 2:B 0-2输,3-9赢,合计A赢3,B赢7
A 3:B 0-3输,4-9赢,合计A赢4,B赢6
A 4:B 0-4输,5-9赢,合计A赢5,B赢5
A 5:B 0-5输,6-9赢,合计A赢6,B赢4
A 6:B 0-6输,7-9赢,合计A赢7,B赢3
A 7:B 0-7输,8-9赢,合计A赢8,B赢2
A 8:B 0-8输,9赢,合计A赢9,B赢1
A 9:B 全输,合计A赢10,B赢0
总计A赢60,B赢40
所以A赢B的几率是60%
如果按二楼的算法,只需要改正A抽0时赢的几率(总赢率要增加5%)就行了:
55%+5%=60%
结果是一样的.
4 5 6 7
4 5 6 7

MG2111年前1
失去对手 共回答了10个问题 | 采纳率90%
4.C 5.A 6.C 7.B 8.B
2/3,1/2,2/5,1/3,2/7,( )
2/3,1/2,2/5,1/3,2/7,( )
【正确答案】A A.1/4 B.1/6 C.2/11 D.2/9
长基1年前2
伊拉 共回答了16个问题 | 采纳率93.8%
2/3,1/2,2/5,1/3,2/7,(1/4 )思路1:分子规律2,1,2,1,2,1.分母3-2=1 5-3=2 7-4=3.思路2:奇数项:2/3 ,2/5,2/7,.偶数项:1/2,1/3 ,(1/4),.思路3:2/3,1/2,2/5,1/3,2/7,(1/4 )可化为:2/3,2/4,2/5,2/6,2/7,(2/8 ).规律很明显了"
2+3+4+5+6+7+8=( )x( )
cycwind1年前7
babasnoopy 共回答了15个问题 | 采纳率93.3%
2+3+4+5+6+7+8=5*7
1+3=2² 1+3+5=3² 1+3+5+7=4² 1+3+5+7+9=5²
1+3=2² 1+3+5=3² 1+3+5+7=4² 1+3+5+7+9=5² .按规律第个等式是?
ch32dj1年前1
浪漫雪季 共回答了17个问题 | 采纳率82.4%
1+3+5+.+(2n-1)=n^2
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6=1/6*7+1/7*8+1/8*9
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6=1/6*7+1/7*8+1/8*9
一乘二分之一加二乘三分之一加三乘四分之一加四乘五分之一加五乘六分之一加六乘七分之一加七乘八分之一加八乘九分之一 等于多少?
1.一乘四分之一加四乘七分之一加七乘十分之一加十乘十三分之一加……加九十七乘一百分之一
2.1*2*3/1+2*3*4/1+3*4*5/1+4*5*6/1+5*6*7/1
3.1*3/1+3*5/1+5*7/1+7*9/1+9*11/1+11*13/1+13*15/1
b1691年前3
liu_ch000 共回答了11个问题 | 采纳率81.8%
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9
=1-1/9
=8/9
(-4)(+6)(-7)
loveczx3161年前4
tianweili 共回答了14个问题 | 采纳率92.9%
原式=(-4)*(-7)*6
=28*6
=168
7,1,2,3,4,5.
7,1,2,3,4,5.

ks950801年前1
rxpomrom 共回答了18个问题 | 采纳率72.2%
7.white
over there
look much the same
in the same class
Can...spell
and ...is
1/3+2/3+1/6+2/6+3/6+4/6+5/6+1/9+2/9+3/9+4/9+5/9+6/9+7/9+8/9+
1/3+2/3+1/6+2/6+3/6+4/6+5/6+1/9+2/9+3/9+4/9+5/9+6/9+7/9+8/9+.,第2011个数是几分之几?
佳贝猫猫1年前1
千万的呼唤 共回答了19个问题 | 采纳率84.2%
答:
当分母为3n时有3n-1项,
总共有2+5+8+…+3n-1=(3n²+n)/2项
当n=36时(3n²+n)/2=19622011
所以第2011个数分母为3×37=111,分子为2011-1962=49
所以第2011个数是49/111
3,4,5,6,7
3,4,5,6,7


feihebeijing1年前1
kxo91 共回答了23个问题 | 采纳率87%
1+2+3+4+5+6+7+8++7+6+5+4+3+2+1
1+2+3+4+5+6+7+8++7+6+5+4+3+2+1
------------------------------
88888888*88888888
lanhai671年前1
斑主20 共回答了27个问题 | 采纳率85.2%
这个是奥数的题目,分成两部分做:
(1)1+2+3+4+5+6+7+8=(1+8)*8/2=36
(2)1+2+3+4+5+6+7=(1+7)*7/2=28
(1)+(2)=36+28=64
7,0,0,3,5,4,1
7,0,0,3,5,4,1

捕快有情1年前1
zzxx老朋友 共回答了28个问题 | 采纳率96.4%
7543100
x-4/x-5 -x-5/x-6 =x-7/x-8 -x-8/x-9
huanggd6241年前0
共回答了个问题 | 采纳率
1+2+3+4+5+6+7+6+5+4+3+2+1
1+2+3+4+5+6+7+6+5+4+3+2+1
有什么规律
浪底暗流1年前8
玫瑰色的梦88 共回答了15个问题 | 采纳率20%
7前面的等于7后面的 49
3+6+8+2+2+5+6+6+2+8+7+3=
Acaiid1年前1
拿来送往 共回答了22个问题 | 采纳率72.7%
73
7/x²+1/x²-x=0
huangjianbin5201年前2
历史的天空下 共回答了18个问题 | 采纳率88.9%
7/x²+1/x(x-1)=0
两边乘x²(x-1)
7x-7+x=0
x=7/8
经检验,x=7/8是方程的解
-3/7+3/2+1+-5
jump12211年前1
fkojk 共回答了18个问题 | 采纳率94.4%
-41/14
A B C D E F G H +8 6 4 1 7 5 3 2 ______________ H G F E D C
A B C D E F G H +8 6 4 1 7 5 3 2 ______________ H G F E D C B A
求abcdefgh
A B C D E F G H +8 6 4 1 7 5 3 2=H G F E D C B A 好麻烦啊 有没有确定的?
4b453e34fd0716131年前1
米娜mina 共回答了19个问题 | 采纳率100%
ABCDEFGH=1B0DE4G9
意思说有很多解
B=0,1,2,3时,G取6,7,8,9
D=0,1,2,3,4,5,6,7时,E取2,3,4,5,6,7,8,9就可以了
1+ 1/1*3 +1/2*3 +1/2*5 +1/3*5 +1/3*7 +1/4*7 +1/4*9
1+ 1/1*3 +1/2*3 +1/2*5 +1/3*5 +1/3*7 +1/4*7 +1/4*9
原式=2*[(1/1*2 +1/2*3 +1/3*4 +1/4*5 +1/5*6 +1/6*7 +1/7*8 +1/8*9)]
=2*[(1/1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)]
=2*[1+(-1/2+1/2)+(-1/3+1/3)……+(-1/8+1/8)-1/9]
=2*8/9
=16/9
谁能告诉我这是不是列项消除法?
为什么前面的第一步要变成2*………?
后面的基本都理解了,就是前面的,
黑色ff球1年前1
fuxianhua 共回答了13个问题 | 采纳率84.6%
这就是裂项法
只有提取一个2出来,各式子的分母才能变成n(n+1)的形式呀!
这样才能够裂项,根据1/n(n+1)=1/n-1/(n+1),就可以消去其他项了.
(1+2/3+2+3/4+3+4/5+4+5/6+5+6/7+6+7/8)/(3+1/3+5+2/4+7+3/5+9+4
(1+2/3+2+3/4+3+4/5+4+5/6+5+6/7+6+7/8)/(3+1/3+5+2/4+7+3/5+9+4/6+11+5/7+13+6/8)=?
要有详细计算过程.麻烦各位大神了,谢谢.
(注:1+2/3=1又2分之3,以此类推)
时间de尾巴1年前2
陈阿珠 共回答了15个问题 | 采纳率93.3%
=1/2
原式=(1+2+3+4+5+6+1-1/3+1-1/4+1-1/5+1-1/6+1-1/7+1-1/8)/
(3+5+7+9+11+13+1-2/3+1-2/4=1-2/5+1-2/6+1-2/7+1-2/8)
=(27-1/3-1/4-1/5-1/6-1/7-1/8)/
(54-2/3-2/4-2/5-2/6-2/7-2/8)
=1/2
(1/3+1/5+1/7)*(1/5+1/7+1/9)-(1/3+1/5+1/7+1/9)*(1/5+1/7)=?
找人来的1年前1
cgxqyx 共回答了17个问题 | 采纳率76.5%
原式=(1/3+1/5+1/7)*(1/5+1/7+1/9)-(1/3+1/5+1/7)(1/5+1/7)-1/9*(1/5+1/7)
=(1/3+1/5+1/7)*(1/5+1/7+1/9-1/5-1/7)-1/9(1/5+1/7)
=(1/3+1/5+1/7)*(1/9)-1/9(1/5+1/7)
=1/9*(1/3+1/5+1/7-1/5-1/7)
=1/9*1/3=1/27
A(3,5) B(-2,7) C(-3,4) D(3,1)
A(3,5) B(-2,7) C(-3,4) D(3,1)
我将该题简化了..只要求出直线AC与直线BD的交点就可以了...我不愿计了..
故园何处1年前6
懒人 共回答了14个问题 | 采纳率100%
根据公式(y-y1)/(y2-y1)=(x-x1)(x2-x1)
得AC:X-6Y+27=0 x=6y-27
BD:6X+5Y-23=0 x=-5/6y+23/6
联立得y=185/41 x=3/41
(-1)*(-6)-(-7)*(+6)
(-1)*(-6)-(-7)*(+6)
(3/4)*(1/2-4+2又2/3)
-3-(-1)*(-1又1/4)
0-(-7/12)*(-15)*(2*3-6)
(-100)*(3/10-1/2+1/5-0.1)
(-3.59)*(-4/7)-2.41*(-4/7)+6*(-4/7)
|-2又1/2|-(-2.5)+1-|1-2又1/2|
3(x-2)=x-(7-8x)
1/3(1-2x)=2/7(3x+1)
(x+2)/4-(2x-3)/6=1
x-(x-1)/2=2-(x+1)/3
(1/2)x-2y=7
(1/2)x-3y=-8
2a-3b=-1
3a=6b=16
2x<3-(x+1)/2
2x+5>0
(x-1)/2>x/3
5x-2<3x+4
(x+8)/3>-x
x+y=8
y+z=3
z+x=-1
bluesky08061年前4
吻过无痕 共回答了19个问题 | 采纳率89.5%
(-1)*(-6)-(-7)*(+6)
=6+42
=48
(3/4)*(1/2-4+2又2/3)
=3/4*(-5/6)
=-5/8
-3-(-1)*(-1又1/4)
=-3-5/4
=4又1/4
0-(-7/12)*(-15)*(2*3-6)
=7/12*(-15)*0
=0
(-100)*(3/10-1/2+1/5-0.1)
=-100*(-0.1)
=10
(-3.59)*(-4/7)-2.41*(-4/7)+6*(-4/7)
=3.59*4/7+2.41*4/7-6*4/7
=4/7*(3.59+2.41)-6*4/7
=6*4/7-6*4/7
=0
|-2又1/2|-(-2.5)+1-|1-2又1/2|
=2又1/2+2.5+1-1.5
=4.5
3(x-2)=x-(7-8x)
3x-6=9x-7
3x=1
x=1/3
1/3(1-2x)=2/7(3x+1)
1/3-2x/3=6x/7+2/7
32x/21=-1/21
x=-1/32
(x+2)/4-(2x-3)/6=1
3x+6-4x+6=12
x=0
x-(x-1)/2=2-(x+1)/3
6x-3x+3=12-2x-2
5x=7
x=7/5
(1/2)x-2y=7
(1/2)x-3y=-8
y=15,x=74
2a-3b=-1,4a-6b=-2
3a+6b=16,
a=2,b=1
2x<3-(x+1)/2
5x/2