Общий знаменатель 1/20+1/30+1/42+1/56=

Question

Общий знаменатель 1/20+1/30+1/42+1/56=

Comments

840

Answer 1

1) 1/20 + 1/30 = 3/60 + 2/60 = 5/60 = 1/12
2) 1/12 + 1/42 = 7/84 + 2/84 = 9/84 = 3/28
3) 3/28 + 1/56 = 6/56 + 1/56 = 7/56 = 1/8
Ответ 1/8

Answer 2

(42+28+20+15)/840=105/840=21/168=3/24=1/8