简便计算。3乘以2分之1十2分之1除以2在乘以7分之1、5分之3一3分之1除以5分之4在除以12点

2024-12-02 12:46:11
推荐回答(2个)
回答1:

3×1/2+1/2÷2×1/7
=1又1/2+1/4×1/7
=1又1/2+1/28
=1又15/28

(3/5-1/3)÷4/5÷12.5%
=4/15÷4/5÷1/8
=1/3÷1/8
=2又2/3

(3/4×75%+3/4×25%)÷7/6
=3/4×(75%+25%)÷7/6
=3/4÷7/6
=9/14

5/3-2/5×4/3÷1/4
=5/3-3/10÷1/4
=5/3-6/5
=7/15

回答2:

得3又32分之5