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two pairs of numbers equal 100

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13y ago
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1y ago

One rule for finding number pairs that add to 100 is to start with one number and subtract it from 100 to find the other number. For example, if one number is 75, subtracting it from 100 gives 25, so the pair is (75, 25).

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Q: What is a rule for finding number pairs that add to 100?
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