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You can do a T-chart and list out all the common factors then find the highest one or you can do upside down divisionwich is like this:Tle long division sighn upside down then the numbers that you are given on the inside then the numbers that go into all of them on the outside. keep doing this until all the numbers have nothing in common. Then multiply all the outside numbers and that is your answer

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13y ago
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Q: How do you get GCFs?
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