Expanded Addition
Add the partitioned numbers beginning with the largest. Choice of 2-digit, 3-digit or 4-digit numbers. An important conceptual step before a more formal method of column addition.
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KS2 Primary Framework:
Year 3: Develop and use written methods to record, support or explain addition of two–digit and three–digit numbers
Year 4: Refine and use efficient written methods to add two-digit and three-digit whole numbers
Year 5: Use efficient written methods to add whole numbers