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Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation(ACMNA055)

LO:

To recognise single-digit addition and subtraction facts.

Know:

How to Subtract
How to add

Understand:

That there are addition and subtraction facts to help aide mental strategies for computation

Do:

I can use number facts to add and subtract quickly.

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Adding

Adding means to increase your original size (making it bigger). You are adding more to the original.

There are 10 addition rules (ways) to make 10.

If I have 1. In order to make 10, I always have to add 9 to it. Same with if I have 2. I always have to add 8 to it to make 10.

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The sum is the result when you add all the numbers together.

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Subtracting

Subtracting means to decrease (take away) from your original amount. You are making the original amount smaller.

Remember adding and subtracting are opposites. 7 + 3 = 10, so 10 – 7 = 3.

So if you know your friends of 10 addition facts, then the friends of 10 subtraction facts should be fairly easy.

The difference is the result when you subtract all the numbers.

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Teaching Ideas

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ACARA Work Samples

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Addition and Subtraction Videos