Question

Вычислите: только номера 1,2,10,11

Answer 1

1. 1/4 + 3/5 = (5 + 12)/20 = 17/20
2. 9/11 - 2/5 = (45 - 22)/55 = 23/55
10. 9/16 + 7/24 - 3/8 = (27 + 14 - 18)/48 = 23/48
11. 1/3 - 1/6 + 1/4 = (4 - 2 + 3)/12 = 5/12