Сторінки 41 - 60 » Стр.50 (3)

23 – 6 = 23 – 3 – 3 = 20 – 3 = 17 31 – 6 = 31 – 1 – 5 = 30 – 5 = 25 64 – 6 = 64 – 4 – 2 = 60 – 2 = 58 75 – 6 = 75 – 5 – 1 = 70 – 1 = 69 21 – 8 = 21 – 1 – 7 = 20 – 7 = 13 34 – 8 = 34 – 4 – 4 = 30 – 4 = 26 60 – 8 = 50 + 10 – 8 = 50 + 2 = 52 86 – 8 = 70 + 16 – 8 = 70 + 8 = 78