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# Number Lines and Rational Numbers

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## Number Lines and Rational Numbers Answer Key

1.
Sam plots -(-4) on the number line. What number(s) should he plot?
1. 0
2. -4
3. 4
4. -4 and 4
2.
To plot the point -(-8) on the number line, the line would need to be extended                 more points to the                .
1. 3, right
2. 3, left
3. 8, right
4. 8, left
3.
If the opposite of 2 was plotted on the number line, which number point(s) would be marked?
1. 2
2. -2
3. -(-2)
4. -2 and -(-2)
4.
Camden plots the opposite of -1 on the number line. What number(s) should be marked?
1. 0
2. 1
3. -1
4. -1 and 1
5.
Which of the following numbers could be plotted on the number line?
1. $-(- 29/4)$
2. $31/5$
3. $13/2$
4. $-(- 9/2)$
6.
Plot the number 5 and its opposite on the number line.
• 5 and -5 should be plotted
7.
Plot the number $-2$ and its opposite on the number line.
• -2 and 2 should be plotted
8.
Graph the following set of numbers on the number line:

{integers less than 4 but greater than or equal to -3}
• -3, -2, -1, 0, 1, 2, 3 should be marked
9.
Write the number 0 on the center of the number line. Determine a scale that will allow you to plot 9 and its opposite on the number line. Write the value of each mark and plot the two points.
• Answers may vary. For example:
-15, -12, -9, -6, -3, 0, 3, 6, 9, 12, 15 with 9 and -9 plotted.
10.
Label the marks on the number line using 0.5 as the interval. The number line should range from -2.5 to 2.5.
• Number line should be labeled:

-2.5, -2.0, -1.5, -1.0, -0.5, 0, 0.5, 1.0, 1.5, 2.0, 2.5
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