[-13*2/2+1/3*(-13)]+(-0.34*2/7-5/7*0.34)

jjyy73842022-10-04 11:39:541条回答

[-13*2/2+1/3*(-13)]+(-0.34*2/7-5/7*0.34)
(-2015又1/6)+(-2014又2/3)+4018又2/3+(-1又1/2)

已提交,审核后显示!提交回复

共1条回复
再重复我就不干了 共回答了17个问题 | 采纳率88.2%
[-13*2/3+1/3*(-13)]+(-0.34*2/7-5/7*0.34)
=-13-0.3=-13.3
(-2015又1/6)+(-2014又2/3)+4018又2/3+(-1又1/2)
=-2015-2014+4018-1-(1/6+2/3-2/3+1/2)
=-12又2/3
1年前

相关推荐

4.2×0.34÷(1.4×0.34)
g2l81年前1
oo小闹 共回答了26个问题 | 采纳率92.3%
解题思路:先算括号里面的,再算乘法,最后算除法.据此解答.

4.2×0.34÷(1.4×0.34),
=4.2×0.34÷0.476,
=1.428÷0.476,
=3.

点评:
本题考点: 小数四则混合运算.

考点点评: 本题主要考查了学生四则运算的计算能力.

(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34))
景茂行1年前1
喜欢猫的狗狗 共回答了16个问题 | 采纳率100%
(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)
这道题目把(1+0.23+0.34)设为A,(0.23+0.34)设为B.
那么原式变成:
A×(B+0.65)-(A+0.65)×B
=AB+0.65A-AB-0.65B
=0.65A-0.65B
=0.65×(A-B)
=0.65×1
=0.65
{因为A=1+0.23+0.34,B=0.23+0.34,那么A-B=1+0.23+0.34-0.23-0.34=1}
66×201.1+0.34×2.011
lijxch1年前1
hdja 共回答了16个问题 | 采纳率93.8%
得13273.2837
(1)5.6+2.4= (2)4.3-0.7= (3)4.28-1.28= (4)2-0.34= (5)5.48+0.6
(1)5.6+2.4= (2)4.3-0.7= (3)4.28-1.28= (4)2-0.34=
(5)5.48+0.6= (6)13-2.7= (7)15-2.5= (8)2.5-2.5=
(9)0.46+0.54= (10)4.2-2.8= (11)7-5.5= (12)0.1×1000=
双葵1年前1
qiyiwen 共回答了23个问题 | 采纳率91.3%
(1)8 (2)3.6 (3)3 (4)1.66
(5)6.08 (6)10.3 (7)12.5 (8)0
(9)1 (10)1.4 (11)1.5 (12)100
(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.34
(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.34)=多少,
老兄看不懂!请仔细一点
tcaldm1年前2
lyq821213 共回答了14个问题 | 采纳率85.7%
设1+0.23+0.34+0.65=a
原式
=(a-0.65)(a-1)-a(a-1-0.65)
=a^2-a-0.65a+0.65-a^2+a+0.65a
=0.65
3+6又2/1*(0.34*6*125*0.8+3*10.75+23又1/4/1/3
66380791年前1
一水百合 共回答了20个问题 | 采纳率95%
3+6又2/1*(0.34*6*125*0.8+3*10.75+23又1/4/1/3)
=3+6又2/1*(0.34*6*100+3*10.75+23又1/4*3 )
=3+6又2/1*【204+3*(10.75+23又1/4)*3】
= 3+6又2/1*【204+3*44】
=3+6.5*336
=3+2184
=2187
—13×2/3-0.34×2/7+1/3×(—13)—5/7×0.34
—13×2/3-0.34×2/7+1/3×(—13)—5/7×0.34
简便方法
清扬_ff1年前2
zhaoli987 共回答了23个问题 | 采纳率82.6%
-13*2/3-0.34*2/7+1/3 *(-13)-5/7 *0.34
=-13*(2/3+1/3)-0.34*(2/7+5/7)
=-13-0.34
=-13.34
楼上的有一点错误,这个才对,用乘法分配【小学知识】来解,汗.差点打配方【初3知识】
(1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34
(1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34)
要简便计算
pasteurised1年前1
溪桥流水 共回答了26个问题 | 采纳率100%
(1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34)
=(0.34+0.56+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34+0.56-0.56)
=0.34x(0.12+0.34+0.56)+(0.56+0.12+0.34)x(0.12+0.34+0.56)-(0.12+0.34)
-(0.12+0.34+0.56)x(0.12+0.34+0.56)+0.56x(0.12+0.34+0.56)
合并同类项,约去相同的式子
=(0.34+0.56)x(0.12+0.34+0.56)-0.12-0.34
=(0.12+0.34+0.56)-0.12-0.34
=0.56
15:21= 27:72= 1.2:36= 34:0.34=
15:21= 27:72= 1.2:36= 34:0.34=
15:21= 27:72= 1.2:36= 34:0.34= 100:150= 4:48= 6.5:13= 6:10= 0.3:0.4= 24:144= 写比值
yiluhuakai1年前1
勇敢冲冲冲 共回答了24个问题 | 采纳率95.8%
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=______.
醉清风81年前2
KADHZ 共回答了18个问题 | 采纳率94.4%
解题思路:通过观察发现这个算式较长,数据较多,但括号中有重复的数据,因此可设0.12+0.23=x,0.12+0.23+0.34=y,算式就简化为:(1+x)y-(1+y)x由此将算式整理计算即可.

设0.12+0.23=x,0.12+0.23+0.34=y.
则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=(1+x)y-(1+y)x,
=y+xy-x-xy,
=y-x,
=(0.12+0.23+0.34)-(0.12+0.23),
=0.12-0.12+0.23-0.23+0.34,
=0.34.
故答案为:0.34.

点评:
本题考点: 小数的巧算.

考点点评: 在完成此类包含数据较多且式中含有相同子算式的题目中,可通过用字母代替式中数据或算式将原算式简化后进行巧算.

(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=______.
战地tt1年前1
chp_0222 共回答了12个问题 | 采纳率91.7%
解题思路:通过观察发现这个算式较长,数据较多,但括号中有重复的数据,因此可设0.12+0.23=x,0.12+0.23+0.34=y,算式就简化为:(1+x)y-(1+y)x由此将算式整理计算即可.

设0.12+0.23=x,0.12+0.23+0.34=y.
则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=(1+x)y-(1+y)x,
=y+xy-x-xy,
=y-x,
=(0.12+0.23+0.34)-(0.12+0.23),
=0.12-0.12+0.23-0.23+0.34,
=0.34.
故答案为:0.34.

点评:
本题考点: 小数的巧算.

考点点评: 在完成此类包含数据较多且式中含有相同子算式的题目中,可通过用字母代替式中数据或算式将原算式简化后进行巧算.

-13×2/3-0.34×2/7+1/3 ×(-13)-5/7 ×0.
有缘相聚情1年前1
winck1 共回答了24个问题 | 采纳率95.8%
-13×2/3-0.34×2/7+1/3 ×(-13)-5/7 ×0.34
=-13×2/3+1/3 ×(-13)-0.34×2/7-5/7 ×0.34
=-13×(2/3+1/3)-0.34×(2/7+5/7)
=-13-0.34
=-13.34
[13*2/2+1/3*(-13)]+(-0.35*2/7-5/7*0.34)
[13*2/2+1/3*(-13)]+(-0.35*2/7-5/7*0.34)
(-2014又1/6)+(-2014又2/3)+4018又2/3+(-1又1/2)
1又1/4-[1/2*(-12)-1/3*(-12)-1/4*(-12)]
(1/6-3/14+2/3-2/7)*(-42)
第一题搞错了是[-13*2/2+1/3*(-13)]+(-0.35*2/7-5/7*0.34)
mylovejustforyou1年前1
traffic1 共回答了18个问题 | 采纳率94.4%
是[-13*2/3+1/3*(-13)]+(-0.35*2/7-5/7*0.35)吧
=(-13)*(2/3+1/3)+(-0.35)*(2/7+5/7)
=-13*1-0.35*1
=-13.35
(-2014又1/6)+(-2014又2/3)+4018又2/3+(-1又1/2)
=-2014-1/6-2014-2/3+4018+2/3-1-1/2
=(-2014-2014+4018-1)-1/6-2/3-1/2
=-11-1/6-4/6-3/6
=-11-8/6
=-33/3-4/3
=-37/3
1又1/4-[1/2*(-12)-1/3*(-12)-1/4*(-12)]
=1+1/4-[-6+4+3]
=1+1/4-1
=1/4
(1/6-3/14+2/3-2/7)*(-42)
=(1/6+4/6-3/14-4/14)*(-42)
=(5/6-7/14)*(-42)
=(5/6-1/2)*(-42)
=(5/6-3/6)*(-42)
=2/6*(-42)
=-14
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
兰夜随想1年前3
多元rr 共回答了19个问题 | 采纳率100%
设0.23+0.34=x
0.23+0.34+0.65=y
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
=(1+x)y-(1+y)x
=y+xy-x-xy
=y-x
=0.65
-14*4/3-0.34*3/7+1/4*(-14)+4/7*(-0.34)
-14*4/3-0.34*3/7+1/4*(-14)+4/7*(-0.34)
简便算法
-14*3/4-0.34*3/7+1/4*(-14)+4/7*(-0.34)刚刚打错了
城市里的猪c1年前2
花夕拾 共回答了17个问题 | 采纳率88.2%
-14*3/4-0.34*3/7+1/4*(-14)+4/7*(-0.34)
=(-14)*(3/4+1/4)+(-0.34)*(3/7+4/7)
=(-14)*1+(-0.34)*1
=(-14)+(-0.34)
=-14.34
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=______.
舒航的小舟1年前1
伤心的下雨天 共回答了18个问题 | 采纳率88.9%
解题思路:通过观察发现这个算式较长,数据较多,但括号中有重复的数据,因此可设0.12+0.23=x,0.12+0.23+0.34=y,算式就简化为:(1+x)y-(1+y)x由此将算式整理计算即可.

设0.12+0.23=x,0.12+0.23+0.34=y.
则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=(1+x)y-(1+y)x,
=y+xy-x-xy,
=y-x,
=(0.12+0.23+0.34)-(0.12+0.23),
=0.12-0.12+0.23-0.23+0.34,
=0.34.
故答案为:0.34.

点评:
本题考点: 小数的巧算.

考点点评: 在完成此类包含数据较多且式中含有相同子算式的题目中,可通过用字母代替式中数据或算式将原算式简化后进行巧算.

﹙1+0.23+0.34﹚×﹙0.23+0.34+0.56)-﹙1+0.23+0.34+0.56﹚×﹙0.23+0.34
﹙1+0.23+0.34﹚×﹙0.23+0.34+0.56)-﹙1+0.23+0.34+0.56﹚×﹙0.23+0.34)
love_gill1年前1
shi1872 共回答了13个问题 | 采纳率92.3%
这就是个移项问题
(1+0.23+0.34)X (0.23+0.34+0.56)-[ (1+0.23+0.34)X(0.23+0.34)+0.56X(0.23+0.34)]
=(1+0.23+0.34)X (0.23+0.34+0.56)-(1+0.23+0.34)X(0.23+0.34)-0.56X(0.23+0.34)
=(1+0.23+0.34)X (0.23+0.34+0.56-0.23-0.34)-0.56X(0.23+0.34)
=(1+0.23+0.34)X 0.56-0.56X(0.23+0.34)
=0.56
(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0
(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)
时间只有1个小时了,求求啊.
哈姆大象1年前1
1难得糊涂1 共回答了18个问题 | 采纳率88.9%
令a=0.34+0.45+0.56
原式=(1+a)(a+0.67)-(1+a+0.67)a
=(1+a)a+0.67(1+a)-(1+a)a-0.67a
=0.67(1+a)-0.67a
=0.67+0.67a-0.67a
=0.67
(1+0.12+0.34)(0.12+0.34+0.57)-(1+0.12+0.34+0.57)(0.12+0.34)怎
(1+0.12+0.34)(0.12+0.34+0.57)-(1+0.12+0.34+0.57)(0.12+0.34)怎么用简便方法计算
J_William1年前1
duanxhtw 共回答了12个问题 | 采纳率100%
令0.12+0.34+0.57=a 0.12+0.34=b 则:(1+0.12+0.34)(0.12+0.34+0.57)-(1+0.12+0.34+0.57)(0.12+0.34) =(1+b)*a-(1+a)*b =a+ab-b-ab =a-b =0.12+0.34+0.57-(0.12+0.34) =0.57
(-13)*2/3-0.34*2/7+1/3*(-13)+0.34*9/7
晨—风1年前3
xx宋 共回答了18个问题 | 采纳率83.3%
应该是(-13)*2/3-0.34*2/7+1/3*(-13)-0.34*9/7
=(-13)*(2/3+1/3)-0.34*(2/7+9/7)
=-13*1-0.34*1
=-13.34
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=______.
ouyfl0961年前2
y11280010 共回答了17个问题 | 采纳率100%
解题思路:通过观察发现这个算式较长,数据较多,但括号中有重复的数据,因此可设0.12+0.23=x,0.12+0.23+0.34=y,算式就简化为:(1+x)y-(1+y)x由此将算式整理计算即可.

设0.12+0.23=x,0.12+0.23+0.34=y.
则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=(1+x)y-(1+y)x,
=y+xy-x-xy,
=y-x,
=(0.12+0.23+0.34)-(0.12+0.23),
=0.12-0.12+0.23-0.23+0.34,
=0.34.
故答案为:0.34.

点评:
本题考点: 小数的巧算.

考点点评: 在完成此类包含数据较多且式中含有相同子算式的题目中,可通过用字母代替式中数据或算式将原算式简化后进行巧算.

(0.12+0.23+0.34)×(0.23+0.34+0.45)-(0.12+0.23+0.34+0.45)×(0.2
(0.12+0.23+0.34)×(0.23+0.34+0.45)-(0.12+0.23+0.34+0.45)×(0.23+0.34)=______.
yanll11年前2
__20051008 共回答了18个问题 | 采纳率94.4%
解题思路:通过观察,此题数字有一定特点,可用设数法解答,假设A=0.12+0.23+0.34,B=0.23+0.34.原式变为A×(B+0.45)-(A+0.45)×B=0.45×(A-B),把A=0.12+0.23+0.34,B=0.23+0.34代入上式,化简即可.

假设A=0.12+0.23+0.34,B=0.23+0.34
原式=A×(B+0.45)-(A+0.45)×B,
=AB+0.45A-AB-0.45B,
=0.45×(A-B);
把A=0.12+0.23+0.34,与B=0.23+0.34代入上式得:
0.45×(0.12+0.23+0.34-0.23-0.34),
=0.45×0.12,
=0.054.

点评:
本题考点: 四则混合运算中的巧算.

考点点评: 此题根据数字特点,采用设数法解答,比较简便.

(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=______.
方块Q1年前3
萧风寒水 共回答了21个问题 | 采纳率85.7%
解题思路:通过观察发现这个算式较长,数据较多,但括号中有重复的数据,因此可设0.12+0.23=x,0.12+0.23+0.34=y,算式就简化为:(1+x)y-(1+y)x由此将算式整理计算即可.

设0.12+0.23=x,0.12+0.23+0.34=y.
则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=(1+x)y-(1+y)x,
=y+xy-x-xy,
=y-x,
=(0.12+0.23+0.34)-(0.12+0.23),
=0.12-0.12+0.23-0.23+0.34,
=0.34.
故答案为:0.34.

点评:
本题考点: 小数的巧算.

考点点评: 在完成此类包含数据较多且式中含有相同子算式的题目中,可通过用字母代替式中数据或算式将原算式简化后进行巧算.

(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34
(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)的巧算
释净水1年前3
风暴亡灵 共回答了13个问题 | 采纳率92.3%
(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)
=(0.23+0.34+0.65)+(0.23+0.34)×(0.23+0.34+0.65)-(0.23+0.34)-(0.23+0.34+0.65)×(0.23+0.34)
=0.23+0.34+0.65-0.23-0.34
=0.65