Lesson 2

Comparing Positive and Negative Numbers

Problem 1

Plot these points on a number line.

  • -1.5
  • the opposite of -2
  • the opposite of 0.5
  • -2

 

Solution

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Problem 2

Decide whether each inequality statement is true or false. Explain your reasoning.

  1. \text-5 > 2
  2. 3 > \text-8
  3. \text-12 > \text-15
  4. \text-12.5 > \text-12

Solution

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Problem 3

Here is a true statement: \text-8.7 < \text-8.4. Select all of the statements that are equivalent to \text-8.7 < \text-8.4.

A:

-8.7 is further to the right on the number line than -8.4.

B:

-8.7 is further to the left on the number line than -8.4.

C:

-8.7 is less than -8.4.

D:

-8.7 is greater than -8.4.

E:

-8.4 is less than -8.7.

F:

-8.4 is greater than -8.7.

Solution

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Problem 4

Plot each of the following numbers on the number line. Label each point with its numeric value. 0.4, -1.5, \text-1\frac{7}{10}, \text{-}\frac{11}{10}

A number line with 5 evenly spaced tick marks, labeled negative 2 through 2.

  

Solution

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Problem 5

Each lap around the track is 400 meters.

  1. How many meters does someone run if they run:

    2 laps?

    5 laps?

    x laps?

  2. If Noah ran 14 laps, how many meters did he run?
  3. If Noah ran 7,600 meters, how many laps did he run?

Solution

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(From Unit 4, Lesson 6.)

Problem 6

Write the solution to each equation as a fraction and as a decimal.

  1. 2x = 3

  2. 5y = 3

  3. 0.3z = 0.009

Solution

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(From Unit 4, Lesson 5.)