Вправи 301 - 400 » 395

Знайди значення виразу. а = 12 3 • 12 + 50 = (3 • 10 + 3 • 2) + 50 = (30 + 6) + 50 = 36 + 50 = 86 а = 23 3 • 23 + 50 = (3 • 20 + 3 • 3) + 50 = (60 + 9) + 50 = 69 + 50 = 119 а = 17 3 • 17 + 50 = (3 • 10 + 3 • 7) + 50 = (30 + 21) + 50 = 51 + 50 = 101 а = 20 3 • 20 + 50 = 60 + 50 = 110 а = 1 3 • 1 + 50 = 3 + 50 = 53 а = 31 3 • 31 + 50 = (3 • 30 + 3 • 1) + 50 = (90 + 3) + 50 = 93 + 50 = 143 а = 19 3 • 19 + 50 = (3 • 10 + 3 • 9) + 50 = (30 + 27) + 50 = 57 + 50 = 107