Question

семь целых 13/15 - (2 целых 7/15 + 3 целых 4/15)

Answer 1

2 7/15 + 3 4/15 = 5 11/15;
7 13/15 - 5 11/15 = 2 2/15;

Answer 2

7 13/15-5 11/15= 2 2/15
______________________