计算,能简算的要简算。
15/7-(8/7+9/14)
=15/7-8/7-9/14
=1-9/14
=5/14
6/7+(4/5-3/10)
=6/7+1/2
=19/14
7/10-1/4+3/10-3/4
=(7/10+3/10)-(1/4+3/4)
=1-1
=0
5/12+(6/7+7/12)
=(5/12+7/12)+6/7
=1+6/7
=1又6/7
7/8-1/6-5/12
=17/24-5/12
=7/24
13/12-5/6+11/24
=1/4+11/24
=17/24
15/7-(8/7+9/14)
=15/7-8/7-9/14
=1-9/14
=5/14
6/7+(4/5-3/10)
=6/7-1/2
=5/14
7/10-1/4+3/10-3/4
=(7/10+3/10)-(1/4+3/4)
=1-1
=0
5/12+(6/7+7/12)
=5/12+7/12+6/7
=1+6/7
=1又6/7
7/8-1/6-5/12
=7/8-(1/6+5/12)
=7/8-7/12
=7/24
13/12-5/6+11/24=
=26/24-20/24+11/24
=17/24