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To work out the sum of two large numbers:
• set the numbers out in columns
• line up the units digits
• start by adding the units digits
• then work across to the left

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## Glossary

### union

The union of two sets A and B is the set containing all the elements of A and B.

### work

Equal to F x s, where F is the force in Newtons and s is the distance travelled and is measured in Joules.

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## This question appears in the following syllabi:

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