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1. Subtraction by mental calculation of three digit numbers without regrouping
2. Subtraction by mental calculation of three digit and single digit numbers with regrouping in the ones' place (1) 3. Subtraction by mental calculation of three digit and single digit numbers with regrouping in the ones' place (2) 4. Subtraction by mental calculation of three digit and single digit numbers with regrouping in the ones' place (3) 5. Subtraction by mental calculation of three digit and single digit numbers with regrouping in the ones' place (4) 6. Subtraction by paper and pencil calculation of three digit and single digit numbers with regrouping in the ones' place 7. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' place (1) 8. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' place (2) 9. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' place (3) 10. Subtraction by paper and pencil calculation of three digit and double digit numbers with regrouping in the ones' place 11. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the tens' place (1) 12. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the tens' place (2) 13. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the tens' place (3) 14. Subtraction by paper and pencil calculation of three digit and double digit numbers with regrouping in the tens' place 15. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the one' and the tens' places (1) 16. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' and the tens' places 17. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' and the tens' places (3) 18. Subtraction by mental calculation of three digit and double digit numbers with regrouping in the ones' and the tens' places (4) 19. Subtraction by paper and pencil calculation of three digit and double digit numbers with regrouping in the ones' and the tens' place 20. Subtraction by mental calculation of three digit and three digit numbers with regrouping 21. Subtravtion in various methods using mental calculation Achievement test Answer sheet |