9×42×125用简便运算怎么算

2025-02-23 07:13:02
推荐回答(1个)
回答1:

你好!9×42×125简便运算方法如下:

9×42×125
=9×(21×2)×125
=9×21×(2×125)
=9×21×250
=9×(7×3)×250
=9×7×(3×250)
=63×750
=(60+3)×750
=60×750+3×750
=45000+2250
=47250