Estimate and use inverse operations to check answers to a calculation
| 1. | True or False?: 47+15=65 | |
| 2. | True or False?: 38+14=52 | |
| 3. | True or False?: 56+17=73 | |
| 4. | True or False?: 29+12=46 | |
| 5. | True or False?: 55+17=72 | |
| 6. | True or False?: 36+49=85 | |
| 7. | True or False?: 62+29=81 | |
| 8. | True or False? 10-5=20-5 | |
| 9. | True or False? 10-7=20-7 | |
| 10. | True or False? 15-2=2-15 | |
| 11. | True or False? 10-2=11-3 |