Question

0.72×8点9+7点2×0点一一怎样简便运算？

Answer 1

简便运算过程如下：
0.72×8.9+7.2×0.11
=7.2×0.89+7.2×0.11
=7.2×（0.89+0.11）
=7.2×1
=7.2

Answer 2

0.72×8.9+7.2×0.11
=0.72×8.9+0.72×1.1
=0.72×(8.9+1.1)
=0.72×10
=7.2