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3.7×87×72.2简便方法

原式=(8x0.9)x1.25x1.4=(8x1.25)x(0.9x1.4)=10x1.26=12.6 供参考.

3.7*17.4-8.7*7.4=3.7*17.4-(8.7*2)*(7.4÷2)=3.7*(17.4-17.4)=0

原式=3.7*(2-1) =3.7*1 =3.7 别忘啦采纳哦~

87*3/86=(86+1)*3/86=86*3/86+1*3/86=3+3/86=261/86(n+1)xa/n=nxa/n+1xa/n=a+a/n

3.7*7*1.5=38.85 ~回答完毕~ ~\(^o^)/~祝学习进步~~~

3.7*8.3+0.83*63=3.7x8.3+0.83x6.3x10=3.7x8.3+8.3x6.3=8.3x(3.7+6.3)=8.3x10=83 希望对你有帮助,满意请及时采纳,你的采纳是我回答的动力!求采纳,我等级低

1.25*3.7*8=1.25*8*3.7=10*3.7=37

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3.7*83+0.83*630=(3.7+6.3)*83=10*83=830你好,本题已解答,如果满意请点右下角“采纳答案”.

3.7*6+3.7*3+3.7=3.7*(6+3+1)=3.7*10=37

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