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More adding multiples of 10 to 2-digit and 3-digit numbers. The units remain the same in these questions.
Adding multiples of 100, often crossing the thousands boundary.
Moving towards the standard method of written addition, adding the least significant figures first (ones).
A mixed selection of adding and subtracting multiples of 10.
Subtraction by compensation means taking away more than you need and then adding some back. It can be quite an effective way to subtract.
By entering 4 + + = you can make your calculator into an ?add 4?machine. Follow the instructions on these pages. Useful when adding the same number lots of times or looking at patterns and sequences.
A good revision exercise on mentally adding and subtracting multiples of 10.
Adding on to the next whole hundred, and then on to the next whole thousand.
The standard written method for addition. Check answers by adding the columns in reverse order.
More adding and taking away 19, 29 etc. Easy if you know how!
Revision pages on adding to make multiples of 10 and subtraction of multiples of 10.
Addition and subtraction of multiples of 100. Easy if you know the totals of pairs of single digits.
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