Розділ 1. Повторення за 3 клас » 164

(60 ● 3) : (4 ● 5) + 90 : 3 = 180 : 20 + 30 = 9 + 30 = 39 (400 : 50) ● 3 + 64 : 1 = 8 ● 3 + 64 = 24 + 64 = 88 30 ● 5 ● 2 – 40 : 8 ● 10 = 150 ● 2 – 40 : 8 ● 10 = 300 – 5 ● 10 = 300 – 50 = 250 20 ● 5 + 25 ● 4 – 5 ● 15 = 100 + 100 – 5 ● (10 + 5) = 200 – 50 – 25 = 150 – 25 = 125