4 целых минус 2 1/5= ?

Question

4 целых минус 2 1/5= ?

Answer 1

4 - 2 1/5 = 4 - 11/5 = 20/5 - 11/5 = 9/5 = 1 4/5

Или
4 - 2 1/5 = 3 5/5 - 2 1/5 = 1 4/5

Answer 2

4-2 1/5=3 5/5-2 1/5=1 4/5..........................