Вправи 402 - 501 » 484

45 : 9 + 52 = 5 + 52 = 57 100 – 3 ● 3 = 100 – 9 = 91 88 + 24 : 6 ● 3 = 88 + 4 ● 3 = 88 + 12 = 100 80 – 3 ● 7 + 3 = 80 – 21 + 3 = 59 + 3 = 62 57 – (35 – 20) : 5 = 57 – 15 : 5 = 57 – 3 = 54 57 – 35 – 20 : 5 = 57 – 35 – 4 = 22 – 4 = 18