257. 90 · 6 900 · 6 9 000 · 6 810:9 8 100:9 81000:9 140-9.5 150-7.8 160-8.8 88:22.10 77:11.100 96:32.1000

1. $$90 × 6 = 540$$

2. $$900 × 6 = 5400$$

3. $$9000 × 6 = 54000$$

4. $$810 ∶ 9 = 90$$

5. $$8100 ∶ 9 = 900$$

6. $$81000 ∶ 9 = 9000$$

7. $$140 - 9 × 5 = 140 - 45 = 95$$

8. $$150 - 7 × 8 = 150 - 56 = 94$$

9. $$160 - 8 × 8 = 160 - 64 = 96$$

10. $$88 ∶ 22 × 10 = 4 × 10 = 40$$

11. $$77 ∶ 11 × 100 = 7 × 100 = 700$$

12. $$96 ∶ 32 × 1000 = 3 × 1000 = 3000$$

Ответ: в решении.