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These are the Transum resources related to the statement: "Pupils should be taught to add and subtract numbers mentally with increasingly large numbers"

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

- 23 or Bust A game involving mental arithmetic and strategy for two players or one player against the computer.
- Addle Arrange the numbers from 1 to 14 in the spaces to make the sums correct. How fast can you do it?
- Beat The Clock It is a race against the clock to answer 30 mental arithmetic questions. There are nine levels to choose from.
- Digital Darts An online darts game for one or two players requiring skill, strategy and mental arithmetic.
- Just In Time Every 10 seconds a new calculation appears on the screen: A dynamic visual aid.
- Nine Digits Arrange the given digits to make three numbers such that two of them add up to the third.
- Nine Nine Nine Use the digits 1 to 9 to make three 3 digit numbers which add up to 999.
- No Partner Find which numbers in a given list do not combine with other numbers on the list to make a given sum.
- Number Crunch Saga A lively numeracy game requiring you to align three numbers to create the given target sum or product.
- One Minute Maths A challenge to mentally add numbers together without making the classic place value mistakes.
- Pairs Eleven Find pairs of playing cards of the same suit which add up to eleven.
- Stamp Sticking Drag stamps onto the envelopes to make the exact postage as shown at the top left of each envelope.
- Sum Game A game against the clock to find the numbers which add up to the target number.
- Triplets Find as many sets of three of the available numbers as possible which add up to the given total.

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