Ejercicios de jerarquía de operaciones:

1. [(56 ÷ 7) × 3 + (81 ÷ 9)] × 2 - 15 =

2. {125 ÷ 5 + [36 ÷ 4 × (12 - 7)]} × 3 - 20 = 

3. [144 ÷ 12 × 3 + (64 ÷ 8)] × 2 - 25 = 

4. {216 ÷ 6 + [49 ÷ 7 × (15 - 8)]} × 3 - 35 = 

5. [(81 ÷ 9) × 4 + (100 ÷ 25)] × 2 - 30 = 

6. {169 ÷ 13 + [63 ÷ 9 × (18 - 12)]} × 3 - 40 = 

7. [196 ÷ 14 × 3 + (121 ÷ 11)] × 2 - 35 = 

8. {225 ÷ 15 + [81 ÷ 9 × (20 - 15)]} × 3 - 45 = 

9. [(144 ÷ 12) × 5 + (169 ÷ 13)] × 2 - 40 = 

10. {256 ÷ 16 + [121 ÷ 11 × (25 - 20)]} × 3 - 50 =