(29十38)X(100一53)的简便计算怎么算啊?

2025-03-22 23:09:35
推荐回答(2个)
回答1:

原式
=67*47
=(57+10)(57-10)
=57*57-100
=3249-100
=3149

回答2:

(29+38)*(100-53)
=67*47
=67*(50-3)
=67*50-67*3
=3350-201
=3149