Explain how constant difference can make written calculations more efficient
Lesson 6 / 10
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I can explain how using the same difference rule can make written calculations easier.
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It is easier to use a written strategy for subtraction when no exchanging is required.
If the minuend and subtrahend are both increased by the same amount, the difference stays the same.
If the minuend and subtrahend are both decreased by the same amount, the difference stays the same.
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