9分之5乘23分之4减23分之5乘9分之4(怎么简便计算) 9x(9分之2加11分之9)乘11(怎

2025-07-15 13:28:09
推荐回答(1个)
回答1:

5/9×4/23-5/23×4/9
=(5×4-5×4)/(23×9)
=0
9×(2/9+9/11)×11
=(2/9+9/11)×99
=22+81
=103