Помогите пожалуйста с Математикой, 6 класс:
11/20 - 5/12 =
8/9 + 7/54 =
5/6 - 17/21 =
3/16 + 1/24 =
5/6 - 22/27 =
7/25 - 4/15 =
3/10 + 1/6 =
2/5 - 11/30 =
3/8 + 7/20 =
1/6 - 1/7 =
5/9 + 7/15 =
3/8 + 19/56 =
19/45 - 7/18 =
1/4 - 1/8 =
11/4 + 8/21 =

11/20 - 5/12 =33/60-25/60=8/60=2/158/9 + 7/54 =48/54+7/54=55/54=1 1/545/6 - 17/21 =35/42-34/42=1/423/16 + 1/24 =9/48+2/48=11/485/6 - 22/27 =45/54-44/54=1/547/25 - 4/15 =21/75-20/75=1/753/10 + 1/6 =9/30+5/30=14/30=7/152/5 - 11/30 =12/30-11/30=1/303/8 + 7/20 =15/40+14/40=29/401/6 - 1/7 =7/42-6/42=1/425/9 + 7/15 =25/45+21/45=46/45=1 1/453/8 + 19/56 =21/56+19/56=40/56=5/719/45 - 7/18 =38/90-35/90=3/90=1/301/4 - 1/8 =2/8-1/8=1/811/4 + 8/21 =231/84+32/84=263/84=3 11/84

1)11/20-5/12=0,55-5/12=11/20-5/12=2/152)8/9+7/54=8+9+7/54=55/543)5/6-17/12=5-6-17/2=-7/124)3/16+1/24=0,1875+1/24=3/16+1/24=11/485)5/6-22/27=5/6-22/27=1/546)7/25-4/15=0,28-4/15=7/25-4/14=1/757)3/10+1/6=0,3+1/6=3/10+1/6=7/158)2/5-11/30=0,4-11/30=2/5-11/30=1/309)3/8+7/20=0,375+0,35=29/4010)1/6-1/7=1/6-7/1=1/4211)5/9+7/15=5/9+7/15=46/4512)3/8+19/56=0,375+19/56=3/8+19/56=5/713)19/45-7/18=19/45-7/18=1/3014)1/4-1/8=0,25-0,125=1/815)11/4+8/21=2,75+8/21=11/4+8/21=263/84