Question

脱式计算，能简算简算，过程

5/6-(1/3+3/10
8/9-4/15+3/5
4/5-(3/4-2/3)
5/12+7/8+7/12+5/8
4/9+5/6-4/9
7/12+4/7+3/7

Answer 1

5/6-(1/3+3/10）
=5/6-1/3-3/10
=3/6-3/10
=30/60-18/60
=12/60
=1/5
8/9-4/15+3/5
=8/9-（4/15-9/15）
=8/9-（-3/9）
=8/9+3/9
=11/9
=1又2/9
4/5-(3/4-2/3)
=4/5-3/4+2/3
=1/20+2/3
=3/60+40/60
=43/60
5/12+7/8+7/12+5/8
=5/12+7/12+（7/8+5/8）
=1+3/2
=2又1/2
4/9+5/6-4/9
=4/9-4/9+5/6
=0+5/6
=5/6
7/12+4/7+3/7
=7/12+（4/7+3/7）
=7/12+1
=1又7/12

Answer 2

5/6-(1/3+3/10)
=5/6-1/3-3/10
=5/6-2/6-3/10
=1/2-3/10=(5-3)/10=1/5
8/9-4/15+3/5
=8/9+3/5-4/15
=8/9+9/15-4/15=8/9+1/3=8/9+3/9=12/9=4/3
4/5-(3/4-2/3)
=4/5-(9-8)/12
=4/5-1/12
=(48-5)/60
=43/60
5/12+7/8+7/12+5/8
=5/12+7/12+7/8+5/8
=1+12/8
=5/2
4/9+5/6-4/9
=4/9-4/9+5/6
=0+5/6
=5/6
7/12+4/7+3/7
=7/12+(4/7+3/7)
=7/12+1
=1又7/12

Answer 3

25/30-(10/30+9/30)=1/5
通分就行了