Question

7,415-3,1115= 8-4,57=

Answer 1

1 целая =15/15

7 4/15 -3 11/15=6 19/15-3 11/15=3 8/15

1 целая =17/17

8 - 4 5/17=(8-4)-5/17=4 -5/17= 3 17/17- 5/17=3 12/17