3.2 ×9.9简算
问题描述:
3.2 ×9.9简算
答
原式=3.2*(10-0.1)
=3.2*10-3.2*0.1
=32-0.32
=31.68
3.2 ×9.9简算
原式=3.2*(10-0.1)
=3.2*10-3.2*0.1
=32-0.32
=31.68