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 |