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this took many attempts.

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this is equivalent fractions

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the inverse rule is easy, all you need to do is get a number line and add the numbers you have used and that will be your answer.

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this is a very easy strategy. we use it all the time but we do not think we do.

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Bridge to decades

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in the split strategy you split the numbers so it is easier to work with. For this instance you are spliting the 10's and the units.