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These are the Transum resources related to the statement: "Pupils should be taught to add and subtract whole numbers with more than 4 digits, including using formal written methods (columnar addition and subtraction)".

Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

- Addition Video A reminder of how to add two or more numbers using the column method.
- Basic Addition A self-marking exercise on addition with increasing levels of difficulty.
- Column Method for Addition Practise your addition skills with this exercise that already has the calculation set out for you.
- Basic Subtraction A self-marking exercise on subtraction with increasing levels of difficulty.
- Four Sum Arrange the given number tiles to make two 2 digit numbers that add up to the given total.
- Nine Nine Nine Use the digits 1 to 9 to make three 3 digit numbers which add up to 999.
- Numbasics A daily workout strengthening your ability to do the basic mathematical operations efficiently.
- Number Skills Inventory A checklist of basic numeracy techniques that every pupil should know.
- Subtraction Video A reminder of how to subtract one number from another using the column method.
- Suko Sujiko Interactive number-based logic puzzles similar to those featuring in daily newspapers.
- Triplets Find as many sets of three of the available numbers as possible which add up to the given total.
- Cosmic Redshift Investigate the number found by performing an algorithm on a three digit number.

Click on a topic below for suggested lesson Starters, resources and activities from Transum.

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