1.8/0.25 巧算

问题描述:

1.8/0.25 巧算

1.8/0.25
=1.8÷(1/4)
=1.8×4
=7.2

原式=1.8×4=7.2

1.8/0.25
=(1.8×4)÷(0.25×4)
=7.2÷1
=7.2