Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Rational Numbers
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Exercise 9 Page 7

The absolute value of a number is its distance from 0 on the number line.

Greater Number: 4
Farther From : - 6

Practice makes perfect

We want to determine which number is greater and which number is farther from 0. We will do these things one at a time.

Greater Number

To find which number is greater, we can plot both numbers on the number line. Let's do it!

plotting point

We can see on the diagram that 4 is farther to the right than - 6. This means that 4 is greater than - 6.

Farther From 0

We want to find which number is farther from 0. Let's recall some facts about the absolute value of a number.

  • The absolute value of a number is its distance from 0 on the number line.
  • Since distance is always greater than or equal to 0, the absolute value of any number is greater than or equal to 0.
  • The absolute value of a non-negative number is equal to the number, while the absolute value of a negative number is equal to its opposite.

Let's consider the distances between different numbers and 0 on the number line.

absolute value

Now, let's find the absolute value of each of the given numbers. |4|= 4 |- 6|= 6 We can plot the absolute values on a number line to see the order from least to greatest.

plotting point

Notice that the number that is the farther to the left is |4|. We can also see on the diagram that |- 6| is farther to the right. In this case, the following inequality holds true. |- 6|> |4| This means that - 6 is farther from 0 than 4.