Column Subtraction - Tablet Version

Working towards an efficent method of column subtraction. Can be used to demonstate expanded subtraction (in which the numbers are partitioned) with or without the need for borrowing.

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Game Objectives

New Maths Curriculum:

Year 3: Add and subtract numbers with up to three digits, using the efficient written methods of columnar addition and subtraction

Year 4: Add and subtract numbers with up to 4 digits using the efficient written methods of columnar addition and subtraction where appropriate

Year 5: Add and subtract whole numbers with more than 4 digits, including using efficient written methods (columnar addition and subtraction)

Year 6: Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why

KS2 Primary Framework:

Year 3:

Develop and use written methods to record, support or explain addition and subtraction of two–digit and three–digit numbers (Block A and Block D)

Year 4:

Refine and use efficient written methods to add and subtract two-digit and three-digit whole numbers (Block A and Block D)

Year 5:

Use efficient written methods to add and subtract whole numbers (Block A and Block D)

Year 6:

Use efficient written methods to add and subtract integers and decimals (Block A and Block D)