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Channel: How to solve a subtraction equation that results in a negative number? - Mathematics Stack Exchange
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Answer by David Liao for How to solve a subtraction equation that results in...

Long subtraction is based off positive numbers, so it doesn't really work if you try to subtract a larger number from a smaller number.A workaround would be to flip the two numbers, and find the...

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Answer by paw88789 for How to solve a subtraction equation that results in a...

I'd take out a thermometer and show her $30$ degrees on the thermometer. Then I'd subtract (get colder by) $45$ degrees, ending at $-15$ degrees.If she hasn't learned about negative numbers yet, you...

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How to solve a subtraction equation that results in a negative number?

So we're home-schooling our 6-yr old and she's doing basic addition/subtraction/multiplication/division.. and I wrote a subtraction problem backwards by accident the other day, and I can't figure out...

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