Вправи 401 - 546 » 426

60 – 60 : 4 = 60 – 40 : 4 – 20 : 4 = 60 – 10 – 5 = 50 – 5 = 45 60 – 60 : 5 = 60 – 50 : 5 – 10 : 5 = 60 – 10 – 2 = 50 – 2 = 48 (18 + 27) : 3 = 18 : 3 + 27 : 3 = 6 + 9 = 15 (16 + 36) : 4 = 16 : 4 + 36 : 4 = 4 + 9 = 13 420 • 2 – 600 = 400 • 2 + 20 • 2 – 600 = 800 + 40 – 600 = 200 + 40 = 240 300 : 3 : 5 = 30 дес. : 3 : 5 = 10 дес. : 5 = 2 дес. = 20