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AC9M1A01 - Recognise, describe and create additive patterns that increase or decrease by a constant amount, using numbers, shapes and objects, and identify missing elements in the pattern. AC9M2A02 - Recall and demonstrate proficiency with addition facts to 20; extend and apply facts to develop related subtraction facts. AC9M2A03 - Recall and demonstrate proficiency with multiplication facts for twos; extend and apply facts to develop the related division facts using doubling and halving.