9/14÷(1/3*6/7-1/14) 1/7+7/8*5/7-3/8 【1/2+(3/4-3/5)】÷7/10 简便计算

问题描述:

9/14÷(1/3*6/7-1/14) 1/7+7/8*5/7-3/8 【1/2+(3/4-3/5)】÷7/10 简便计算

9/14÷(1/3*6/7-1/14)
=9/14÷(2/7-1/14)
=9/14÷3/14
=3
1/7+7/8*5/7-3/8
=1/7+5/8-3/8
=1/7+1/4
=4/28+7/28
=11/28
【1/2+(3/4-3/5)】÷7/10
=(0.5+0.75-0.6)÷0.7
=0.65÷0.7
=13/14