89ᠧ17+28ᠧ12-17ᠧ12的简便计算怎么做

2024-11-01 08:37:54
推荐回答(3个)
回答1:

89x17+28x12-17x12
=12x(89+28-17) + 5x89
=12x100 + 5x90 -5
=1200+450 -5
=1645

回答2:

89✘17+28✘12-17✘12
=17X(89+28-17)
=17X100
=1700

回答3:

Onetwothreefour