Doubling, Halving 2 Digit Numbers Extended

4pp. Doubling and halving 2-digit numbers, x10 and dividing by 10, extending to x20 and dividing by 20. Use with “Doubling, Halving 2 Digit Numbers Mentally” [PowerPoint TBM501]

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Australian Curriculum Alignment:

Yr 5


Solve problems involving multiplication of large numbers by one- or two-digit numbers using efficient mental, written strategies and appropriate digital technologies

Yr 5


Use efficient mental and written strategies and apply appropriate digital technologies to solve problems

Yr 6


Multiply and divide decimals by powers of 10

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