十七分之七乘九分之八加十七分之十乘九分之七怎样简便就怎样算

2025-06-20 19:59:07
推荐回答(1个)
回答1:

7/17×8/9+10/17×7/9
=7/(17×9)×(8+10)
=7×18/(17×9)
=7×2/17
=14/17