12.5乘2.4减13.5的简便计算方法?

2024-12-01 10:02:03
推荐回答(2个)
回答1:

12.5×2.4-13.5=16.36

回答2:

=12.5×2.4-12.5-1
=12.5x(2.4-1)-1
=12.5x1.4-1
=17.5-1
=16.5