Ответ:

Решение:
* 230 + 70 * 3 = 230 + 210 = 440
* (460 + 40) * 2 = 500 * 2 = 1000
* (470 - 70) * 2 = 400 * 2 = 800
* 380 - 80 * 3 = 380 - 240 = 140
* 684 : 9 + (506 - 102 * 3) = 684 : 9 + (506 - 306) = 76 + 200 = 276
* 736 : 4 + (607 - 428 : 4) = 184 + (607 - 107) = 184 + 500 = 684
* 600 + 180 : 6 + 9 = 600 + 30 + 9 = 639
* 360 : (120 + 240) * 4 = 360 : 360 * 4 = 1 * 4 = 4