Решение:
- 450 + 570 = 600 - 80 (450 + 570 = 1020; 600 - 80 = 520; 1020 != 520)
- 560 : 8 = 490 : 7 (560 / 8 = 70; 490 / 7 = 70)
- 659 - 384 = 100 + 275 (659 - 384 = 275; 100 + 275 = 375; 275 != 375)
- 280 + 320 = 600 - 300 (280 + 320 = 600; 600 - 300 = 300; 600 != 300)
- 5 * 15 = 225 - 150 (5 * 15 = 75; 225 - 150 = 75)
- 21.75 * 16 = 540 - 444 (21.75 * 16 = 348; 540 - 444 = 96; 348 != 96)
Ответ: 570, 8, 384, 600, 15, 21.75