3 целых 3/5 + 6 целых 11/15 - 2 целых 1/12 = (3 + 6 - 2) + (3/5 + 11/15 - 1/12)= 7 + (9/15 + 11/15 - 1/12)= 7 + (20/15 - 1/12)= 7 + (16/12 - 1/12)= 7 + 15/12= 7 3/4
5 целых 9/10 - 1 целая 5/12 - 1 целая 11/24 = 5 + 9/10 - 1 - 5/12 - 1 - 11/24= 5 + 9/10 - 1 - 5/12 - 1 - 11/24= 5 + 9/10 - 1 - 5/12 - 1 - 11/24= 5 + 54/60 - 1 - 25/60 - 1 - 22/48= 5 + 9/10 - 1 - 5/12 - 1 - 11/24= 4 11/20
13 - (5 целых 3/10 + 4 целых 5/6) = 13 - (5 + 3/10 + 4 + 5/6)= 13 - (9 + 3/10 + 5/6)= 13 - (9 + 18/60 + 50/60)= 13 - (9 + 68/60)= 13 - (9 + 34/30)= 13 - (9 + 17/15)= 13 - 9 - 1 2/15= 4 13/15
3 целых 3/5 + 6 целых 11/15 - 2 целых 1/12 = (3 + 6 - 2) + (3/5 + 11/15 - 1/12)
= 7 + (9/15 + 11/15 - 1/12)
= 7 + (20/15 - 1/12)
= 7 + (16/12 - 1/12)
= 7 + 15/12
= 7 3/4
5 целых 9/10 - 1 целая 5/12 - 1 целая 11/24 = 5 + 9/10 - 1 - 5/12 - 1 - 11/24
= 5 + 9/10 - 1 - 5/12 - 1 - 11/24
= 5 + 9/10 - 1 - 5/12 - 1 - 11/24
= 5 + 54/60 - 1 - 25/60 - 1 - 22/48
= 5 + 9/10 - 1 - 5/12 - 1 - 11/24
= 4 11/20
13 - (5 целых 3/10 + 4 целых 5/6) = 13 - (5 + 3/10 + 4 + 5/6)
= 13 - (9 + 3/10 + 5/6)
= 13 - (9 + 18/60 + 50/60)
= 13 - (9 + 68/60)
= 13 - (9 + 34/30)
= 13 - (9 + 17/15)
= 13 - 9 - 1 2/15
= 4 13/15