Question

1.25乘7.2的递等试能简便的就简便不能简便的用园先的。

Answer 1

①1.25×7.2 ②1.25×7.2
=1.25×（7+0.2） =0.25×5×2×3.6
=1.25×7+1.25×0.2 =2×0.25×5×3.6
=8.75+0.25 =1/2×18
=9 =9

懂了么？？请您采纳,求采纳.

追答

③1.25×7.2
=1.25×（8-0.8）
=1.25×8-1.25×0.8
=10-1
=9

④1.25×7.2
=0.25×5×3×2.4
=3/4×12
=9

Answer 2

1.25✘7.2
=1.25✘（7+0.2）
=1.25✘7+1.25✘0.2
=8.75+0.25
=9

Answer 3

1.25*7.2
=1.25*（8-0.8）
=1.25*8-1.25*0.8
=10-1
=9