请完成下列计算题,能简算的要简算~用递等式哦!

问题描述:

请完成下列计算题,能简算的要简算~用递等式哦!
9/8 - 1/7 + 1/8 - 6/7
11/8 - ( 3/10 + 3/8 )- 7/10

9/8 - 1/7 + 1/8 - 6/7
=(9/8+1/8)—(1/7+6/7)
=5/4-1
=1/4
11/8 - ( 3/10 + 3/8 )- 7/10
=11/8-3/10-3/8-7/10
=(11/8-3/8)-(3/10+7/10)
=1-1
=0