计算题:9.9*7.23+0.723用简便算法请帮帮忙孩子明天交9.9*7.23+0.723

问题描述:

计算题:9.9*7.23+0.723用简便算法
请帮帮忙孩子明天交
9.9*7.23+0.723

d

9.9*7.23+0.723
=9.9*7.23+0.1*7.23
=(9.9+0.01)*7.23
=10*7.23
=72.3