Варіант 4. Номер 35
1) (374 + 978) + 626 = 374 + 626 + 978 = 1978;
2) 7937 + 476 + 524 = 7937 + 1000 = 8937;
3) 242 + 537 + 358 + 263 = (242 + 358) + (537 + 263) = 600 + 800 = 1400;
4) (1685 + 14703) + (5297 + 2315) = (1685 + 2315) + (14703 + 5297) = 4000 + 20000 = 24000.