Выполните действия. 12 3/5-7 1/6+2 3/10

Question

Выполните действия. 12 3/5-7 1/6+2 3/10

Answer 1

12 3/5 - 7 1/6 + 2 3/10 = 7 11/15
1) 12 3/5 - 7 1/6 = 63/5 - 43/6 = (378-215)/30 = 163/30
2) 163/30 + 2 3/10 = 163/30 + 23/10 = (163+69)/30 = 232/30 = 7 22/30 = 7 11/15