Question

Помогите, сделайте задание номер 1

Answer 1

5/9 + 7/8 = (40+63)/72 = 103/72
9/20 - 5/12 = (45-15)/60 =30/60 = 1/2
9/10 - (3/5 + 1/6) + 2/3 = 9/10 -(18+5)/30+ 2/3 = (27 - 23 + 20)/30 = 24/30 = 4/5

Answer 2

А) 5\9+7\8=40\72+63\72=103\72
б) 9\20-5\12=23\60-25\60=-2\60
в)9\10-(3\5+1\6)+2\3=27\30-18\30-5\30-20\20=-16\20