Розділ 1. Повторення за 3 клас » 167

7 ● 8 + 4 ● 8 : 2 – 12 : 4 ● 5 = 56 + 4 ● 4 – 3 ● 5 = 56 + 16 – 15 = 57 100 – 40 : 5 ● 2 : 4 ● 9 = 100 – 8 ● 2 : 4 ● 9 = 100 – 4 ● 9 = 100 – 36 = 64 36 : 6 ● 1 + 72 : 6 + 72 = 6 + (60 + 12) : 6 + 72 = 6 + 10 + 2 + 72 = 10 + 80 = 90 720 : 6 – 40 ● 2 + 270 : 3 = (600 + 120) : 6 – 80 + 90 = 120 – 80 + 90 = 40 + 90 = 130