- $$14 \times 60 = 840$$
- $$29 \times 30 = 870$$
- $$240 + 22 \times 30 = 240 + 660 = 900$$
- $$900 - 18 \times 50 = 900 - 900 = 0$$
- $$1000 - (23 \times 40 - 570 : 3) = 1000 - (920 - 190) = 1000 - 730 = 270$$
- $$(850 - 12 \times 70) \times 10 : 25 = (850 - 840) \times 10 : 25 = 10 \times 10 : 25 = 100 : 25 = 4$$
Ответ: 840, 870, 900, 0, 270, 4