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42×85加42×15用简便方法计算

42×85+42×15 =42×(85+15) =42×100 =4200

=(40+2)×(25+60)+(40+2)×(5+10) =1000+120+200+20 =1340

42×85≠85×40 ~回答完毕~ ~\(^o^)/~祝学习进步~~~

5800÷58+85×42简便计算 =100+85x(40+2) =100+85x40+85x2 =100+3400+170 =3670

42.85-12.85-13.26 =30-13.26 =16.74

(1)2000-45×24+96=2000-1080+96=920+96=1016;(2)(1254-78×12)×53=(1254-936)×53=318×53=16854;(3)(640÷4)×(78+12)=160×90=14400;(4)28×28+13×26=784+338=1122;(5)30×(234÷9)=30×26=780;(6)18×(313-259)=18×54=972.

2500除以25+85乘以42的简便算 2500÷25+85x42 =100+85x6x7 =100+510x7 =100+3570 =3670

[186-(42+74)]×85简算过程详细 =【186-116】×85 =70×85 =5950 直接算最简便

1、53.2*102-2*53.2 =53.2(102-2) =53.2*100 =5320 2、(6.4+3.9-6.4+3.9)/0.13 =(6.4-6.4+3.9*2)/0.13 =3.9*2/0.13 =30*2 =60 3、5.7/0.8/5.7 =5.7/5.7/0.8 =1/0.8 =1.25 4、2.53/0.5-0.53/0.5 =(2.53-0.53)/0.5 =2/0.5 =...

85-28=(74)-17=42+(15)=(29)+28=75-(18)

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