Question

九分之五乘十一分之五和十一分之6×9分之五列式计算能简便要简便怎么算？

Answer 1

5／9x5／11＝25／99
6／11×5／9＝2／11×5／3＝10／33

Answer 2

5/9×5/11+6/11×5/9 提取公因式5/9
= 5/9×（5/11+6/11）
=5/9×（5+6）/11
=5/9×1
=5/9