3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算

3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算
3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算

3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算
3/2+7/3+7/4
=3/2+1
=1又3/2

9又5/4-2又7/2-1又7/5
=9又5/4-(2又7/2+1又7/5)
= 9又5/4-4
=5又5/4
10/4+12/5+10/6
= 10/4+10/6+12/5
=1又12/5
12/5+6/1+12/7+6/5
=12/5+12/7+6/1+6/5
=1+1
=2