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You draw a straight line; mark a point and call it "zero"; decide on which direction should be positive; mark points at regular intervals - for example, every centimeter; and label those points. To one side of zero you mark the points as 1, 2, 3, etc.; to the other side, as -1, -2, -3, etc.

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11y ago

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Q: How do you make a number line?
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