7.2×9.9+0.72简便计算
问题描述:
7.2×9.9+0.72简便计算
答
7.2×9.9+0.72
=7.2X(9.9+0.1)
=7.2x10
=72
7.2×9.9+0.72简便计算
7.2×9.9+0.72
=7.2X(9.9+0.1)
=7.2x10
=72