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25x37+25x63的简便运算

25x37+25x63的简便运算 =25x(37+63) =25x100 =2500

25×37-25×33 =25×(37-33) =25×4 =100

=(37+64-1)×63 =100×63 =6300

0.7*3.7/0.37=0.7*10=7

37x37+73x63=(40-3)x(40-3)+(70+3)x(60+3)=1600+4200+(-40-40+70+60)x3+9+9=5968 当然,你口算的时候是不需要列算式的,可以这样想,40x40是1600,70x60是4200,这样就是5800;然后十位的话是7+6-4-4是5乘以三就是150加9加9就是168,加前面的580...

9.9×37+3.7 =99×3.7+3.7 =3.7×(99+1) =3.7×100 =370

=2.9×(5.137+4.633) =2.9×10 =29

简便简便运算 0.87x65.5+37.5x0.87一3x0.87 =0.87×(65.5+37.5-3) =0.87×100 =870

1.02×37.9=38.658 回答完毕~~ 有疑问请追问,无疑问请点击【采纳】~ 祝学习进步~~~\(^o^)/~

用简便方法计算下面各题37x28+28x13 37x28+28x13 =28*(37+13) =28*40 =1120

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