Найдите значение суммы: -5/12+3/8 -1/8+3/5 -3/5+2/2

Question

Найдите значение суммы:
-5/12+3/8
-1/8+3/5
-3/5+2/2

Answer 1

-5/12 + 3/8 = -10/24 + 9/24 = -(10/24 - 9/24) = -1/24,

-1/8 + 3/5 = -5/40 + 24/40 = 24/40 - 5/40 = 19/40,

-3/5 + 2/2 = -6/10 + 10/10 = 10/10 - 6/10 = 4/10 = 2/5