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4 |
- Adds on or subtracts from a two digit numer
- Mentally Adds and subtracts values to 100 including regrouping for addition and subtraction
- Adds and subtracts money values by composing and decomposing into coin values.
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5 |
- Constructs and deconstructs addition and subtraction problems to 10 000.
- Regroup with addition fairly easily
- Regrouping with subtraction is cumbersome with problems requiring multiple regroupings
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6 |
- Constructs and deconstructs addition and subtraction problems of any size with and without regrouping until confidence in the accuracy of the solution is attained.
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Dr. Robert Sweetland's notes