Mental addition skills

Adding several numbers. A useful tip is to look for pairs of numbers that make 10 and do that part of the sum first.

Practise finding pairs of multiples of 5 that total 100. There are only about ten pairs and if possible they should be learnt.

Look for pairs of numbers that make 20 in these addition questions.

Use knowledge of place value to add quickly.

More practice at adding the nearest whole ten and adjusting, as well as looking at addition patterns.

Adding 99 by adding 100 and subtracting 1.

Adding 9 or 11 to 3-digit numbers by adding 10 and adjusting.