Quick mental addition

Without using paper and pencil practise adding three small numbers as well as adding two 2-digit numbers.

Working carefully, looking for patterns to help, remembering that addition can be done in any order.

Add a number near to 1,000 by adjusting.

Harder mental addition, using all the skills and strategies learned so far.

Work carefully, using patterns such as pairs of numbers that make 10, to help answer these.

Add two 4-digit multiples of 100 whith exchange.

A good revision exercise on mentally adding and subtracting multiples of 10.

Adding a single digit to a 3-digit number; there might well be plenty of counting on fingers here!