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# National Curriculum: Addition and Subtraction - Year 3

Created on 14 October 2013 by ncetm_administrator
Updated on 10 March 2014 by ncetm_administrator

# National Curriculum: Addition and Subtraction - Year 3

• add and subtract numbers mentally, including:
• a three-digit number and ones
• a three-digit number and tens
• a three-digit number and hundreds
• add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction
• estimate the answer to a calculation and use inverse operations to check answers
• solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction.

## Non-Statutory Guidance

Pupils practise solving varied addition and subtraction questions. For mental calculations with two-digit numbers, the answers could exceed 100.

Pupils use their understanding of place value and partitioning, and practise using column addition and subtraction with increasingly large numbers up to three digits to become fluent (see Mathematics Apendix 1).