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Integers and the Number Line. Bob Guilbert. Constructing a Number Line. A number line is drawn by choosing a starting position, usually 0, and marking off equal distance from that point.

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## Integers and the Number Line

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**Integers and the Number Line**Bob Guilbert**Constructing a Number Line**• A number line is drawn by choosing a starting position, usually 0, and marking off equal distance from that point**Although only a portion of the number line is shown, the**arrowheads indicate that the line and the set of numbers continue**The set of numbers used on the number line is called the set**of integers • This set can be written {…, -3, -2, -1, 0, 1, 2, 3, …}**The number line is made up of 3 sets of numbers**• Natural numbers 1, 2, 3, 4, … • Whole numbers 0, 1, 3, 4, … • Integers …, -2, -1, 0, 1, 2, …**We can use a Venn Diagram to represent thee 3 sets of**numbers and their relationship to one another**You should not include the number 0**• You should not include numbers less than 0 (negative numbers) • You should not include the number 6 or any higher**Positive numbers move to the right**• Negative numbers move to the left • + 3 + (-8) = -5

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