简便计算9分之7除以9分之11加9分之2乘以11分之5

2025-07-09 19:18:34
推荐回答(1个)
回答1:

7/9÷11/9+2/9×5/11
= 7/9×9/11+2/9×5/11
=(7×9+2×5)/(9×11)
=73/99