8分之5×【（4分之3-2分之1）÷12分之5】要简便_数学解答

8分之5×【（4分之3-2分之1）÷12分之5】要简便

人气：134 ℃　时间：2020-03-23 10:08:35

解答

5/8×[(3/4-1/2)÷5/12]
=5/8×(3/4-1/2)÷5/12
=5/8×(3/4-1/2)×12/5
=5/8×12/5×(3/4-1/2)
=3/2×(3/4-1/2)
=3/2×1/4
=3/8