35×4+25×20用简便运算?

2024-11-28 17:54:14
推荐回答(3个)
回答(1):

这道题简算如下
原式=7×5×4+25×20
=20×(7+25)
=20×32
=640

回答(2):

35×4+25×20
=7×5×4+25×20
=7×20+25×20
=(7+25)×20
=32×20
=640

回答(3):

35x4+25ⅹ20
=35x4+125x4
=(35+125)x4
=160x4
=640