ПОЖАЛУЙСТА,помогите с самым последним номером

1-

1)16 3/5 + 17 7/10 = 33 + (6/10+7/10) = 33 13/10 = 34 3/10
2)25 5/8 - 18 3/4 = 24 13/8 - 18 6/8 = 6 7/8
3)34 3/10 - 6 7/8 =34 12/40 - 6 35/40 = 33 52/40 - 6 35/40 = 27 17/40

2-

1)8 7/60 + 3 3/4 = 11+(7/60+45/60) = 11 52/60 = 11 13/15
2)11 13/15 - 8 7/15 =3 6/15=3 2/5
3)4 2/5- 3 2/5 =1

3-

1)13 5/12 +2 11/18 = 13 15/36+ 2 22/36 = 15 37/36
2)25 7/9 - 8 3/4=25 28/36 - 8 27/36 = 17 1/36= 16 37/36
3)16 37/36-15 37/36 = 1

4-

1)20-19 3/4= 19 4/4-19 3/4= 1/4
2)17 3/4-17=3/4
3)2 1/2 - 17/24 =1 3/2 - 17/24 = 1 36/24 - 17/24= 1 19/24
4)1/4+3/4=1
5)1 + 1 19/24=2 19/24