1. Вычислите
(63 1/5-41 3/5-2/15+6 целых)-(19 целых-6 11/12+3/8-3/16)

..............................................................=12 13/48

1)   63 1/5 - 41 3/5 =62 6/5 - 41 3/5=21 3/5

2)   21 3/5 - 2/15=21 9/15 - 2/15=19 7/15

3)   19 7/15 +6=25 7/15

4)   19 - 6 11/12=18 12/12 - 6 11/12=12 1/12

5)   3/8 - 3/16=6/16 - 3/16= 3/16

6)   12 1/12+3/16=12 4/48+9/48=12 13/48