6分之5×9分之5 9分之5×6分之1用简便方法计算?

2024-11-29 21:01:21
推荐回答(1个)
回答1:

5/6×5/宴侍9+5/9×1/6
=(5/6+1/启祥森6)×5/悄亩9
=1×5/9
=5/9