一.3.9x1.4÷0.35二.0.13x102三.0.5x2.33x4四.9.07-22.78÷34 .能用简便算法的

baichi192022-10-04 11:39:542条回答

一.3.9x1.4÷0.35二.0.13x102三.0.5x2.33x4四.9.07-22.78÷34 .能用简便算法的要用

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共2条回复
xjxj1007 共回答了19个问题 | 采纳率68.4%
(1) 3.9x1.4÷0.35=3.9x.(1.4÷0.35)=3.9x4=(4-0.1)x4=16-0.4=15.6
(2) 0.13x102=0.13x(100+2)=13+0.26=13.26
(3) 0.5x2.33x4=0.5x4x2.33=2x2.33=4.66
(4) 9.07-22.78÷34=9.07-(17+5.78)÷34=9.07-(0.5+0.17)=8.9-0.5=8.4
1年前
飞叶无寂 共回答了47个问题 | 采纳率
(1)3.9x1.4÷0.35
=5.46÷0.35
=15.6
(2)0.13x102
=0.13x(100+2)
=0.13x100+0.13x2
=13+0.26
=13.26
(3)0.5x2.33x4
=(0.5x4)x2.33
=2x2.33
=4.66
(4)9.07-22.78÷34
=9.07-0.67
=8.4
1年前

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一.3.9x1.4÷0.35二.0.13x102三.0.5x2.33x4四.9.07-22.78÷34 .能用简便算法的
一.3.9x1.4÷0.35二.0.13x102三.0.5x2.33x4四.9.07-22.78÷34 .能用简便算法的要用
麦田里的虫子1年前2
ajlhkc 共回答了12个问题 | 采纳率100%
3.9x1.4÷0.35 0.13*102 0.5*2.33*4 9.07-22.78÷34
=3.9*2*0.7÷0.7÷0.5 =0.13*(100+2) =0.5*4*2.33 =9.07-0.67
=7.8÷1/2 =0.13*100+0.13*2 =2*2.33 =8.4
=7.8*2 =13+0.26 =4.66
=15.6 =13.26