42x128x8x5最简便的计算方法

2025-04-16 15:33:54
推荐回答(2个)
回答1:

42x128x8x5
=(42x5)x128x8
=210x(125+3)x8
=210x(125x8+3x8)
=210x(1000+24)
=210x1000+210x24
=210000+210x6x4
=210000+5040
=215040
谢谢,请采纳

回答2:

不好巧算