4.5×0.8÷4.5×0.8的简便方法谁知道谢谢!

问题描述:

4.5×0.8÷4.5×0.8的简便方法谁知道谢谢!

4.5×0.8÷4.5×0.8
=(4.5×0.8÷4.5)×0.8
=0.8×0.8
=0.64