9/7/5/11+11/5×9/2怎样用简便放法计算
问题描述:
9/7/5/11+11/5×9/2怎样用简便放法计算
答
9/7÷5/11+11/5×9/2
=9/7×11/5+11/5×9/2
=11/5(9/7+9/2)
=11/5×81/14
=891/70