Вправи 402 - 501 » 456-457

3 + 7 ● 10 = 3 + 70 = 73 (3 + 7) ● 10 = 10 ● 10 = 100 3 ● (22 – 12) : 5 = 3 ● 10 : 5 = 30 : 5 = 6 48 – 48 : 6 : 8 = 48 – 8 : 8 = 48 – 1 = 47 457. У таблиці зазначена 1/5 кожного числа. Назви числа. 2 ● 5 = 10, 7 ● 5 = 35, 1 ● 5 = 5, 9 ● 5 = 45, 4 ● 5 = 20, 10 ● 5 = 50 3 ● 5 = 15, 0 ● 5 = 0, 3 ● 5 = 15, 6 ● 5 = 30