This task is about using doubling and halving to solve equations.
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A doubling and halving strategy can be used to make some equations easier to solve.
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a)
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Use doubling and halving to write an easier equation to solve 3 × 14.
_____ × _____ = |
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b)
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Use doubling and halving to write an easier equation to solve 18 × 4.
_____ × _____ = |
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c)
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Use doubling and halving to write an easier equation to solve 36 × 5.
_____ × _____ = |
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| d) |
Awhina needs to solve: 15 × 18 =
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James needs to solve: 25 × 32 =
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e) |
