下面各题怎样计算比较简便

Question

如题所述

Answer 1

0.88X125=0.88X(100+25)
=88+25
=113

10.28-2.72-7.28
=10.28-7.28-2.72
=3-2.72
=0.28

6.6X101-6.6

=6.6X(101-1)
=6.6X100
=660

9.9X10.1

=9.9X(10+0.1)
=99+0.99
=99.99

21.47+15.4+8.53+4.6

=(21.47+8.53)+(+15.4+4.6)
=30+20
=50

1.6X2.5X1.25
=0.4×4×2.5×1.25
=4×2.5×0.4×1.25
=10×0.5
=5本回答被网友采纳

Answer 2

分解合并的方式凑整就可以了，详细自己做。