Вычислите: 1/2-1/3-1/5. 1/4-1/5-1/10

Question

Вычислите: 1/2-1/3-1/5. 1/4-1/5-1/10

Answer 1

1) 1/2-1/3-1/5 = 15/30-10/30-6/30= -1/30
2) 1/4-1/5-1/10 = 5/20-4/20-2/20 = -1/20