28分之5除以7分之5乘以0.4

问题描述:

28分之5除以7分之5乘以0.4

0.1

5/28除5/7*0.4
=5/28*7/58*0.4
=1/4*0.4
=1/4*2/5
=10
(应该是对的,你做时顺便看我有木有算错吧!)

=5/28X7/5X0.4
=1/4X0.4
=0.1