Сторінки 41 - 60 » Стр.42 (6)

Розв’яжи рівняння. 148 + х = 567 + 129 148 + х = 696 х = 696 – 148 х = 548_______ 148 + 548 = 696 696 = 696 (274 + 307) – t = 305 581 – t = 305 t = 581 – 305 t = 276_______ 581 – 276 = 305 305 = 305 с – 329 = (24 • 28) : 24 с – 329 = 672 : 24 с – 329 = 28 с = 329 + 28 с = 357______ 357 – 329 = 28 28 = 28 (15 – b) • 4 – 9 = 27 (15 – b) • 4 = 27 + 9 (15 – b) • 4 = 36 15 – b = 36 : 4 15 – b = 9 b = 15 – 9 b = 6____________ (15 – 6) • 4 – 9 = 27 9 • 4 – 9 = 27 36 – 9 = 27 27 = 27