Сторінки 61 - 80 » Стр.72 (9)

4 : 2 + 6 = 2 + 6 = 8; 8 : 2 + 66 = 4 + 66 = 70 10 : 2 + 8 = 5 + 8 = 13; 2 · 9 – 12 = 18 – 12 = 18 – 10 – 2 = 6 16 : 2 – 6 = 8 – 6 = 2; 12 : 2 + 34 = 6 + 34 = 40 14 : 2 + 33 = 7 + 33 = 40; 2 · 7 – 5 = 14 – 5 = 14 – 4 – 1 = 9