数学题:8.42乘9.6加0.4乘842,怎样简便计算
问题描述:
数学题:8.42乘9.6加0.4乘842,怎样简便计算
答
题目错,改为:
8.42×9.6+0.04×84.2
=8.42×9.6+8.42×0.4
=8.42×(9.6+4)
=8.42×10
=84.2