Вправи 451 - 600 » 498
а) (35 + 51 : 17) • 12 – 49 = (35 + 3) • 12 – 49 = 38 • 12 – 49 = 456 – 49 = 407. б) (121 – 33 • 2) : 11 + 83 = (121 – 66) : 11 + 83 = 55 : 11 + 83 = 5 + 83 = 88.
а) (35 + 51 : 17) • 12 – 49 = (35 + 3) • 12 – 49 = 38 • 12 – 49 = 456 – 49 = 407. б) (121 – 33 • 2) : 11 + 83 = (121 – 66) : 11 + 83 = 55 : 11 + 83 = 5 + 83 = 88.