Video playlist
Number bonds to 10. Video
Number bonds are pairs of numbers that make a total.

Adding or subtracting 10. Video
Adding by making 10 is also called bridging through 10.

Column addition. Video
Learn how to use the column method for addition.

Column subtraction. Video
Use column subtraction when numbers are too large to subtract mentally.

Adding or subtracting numbers in your head. Video
Rounding and partitioning help with mental maths.

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