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Pearson Algebra 1 Common Core, 2011 View details

6. Multiplying and Dividing Real Numbers

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Exercise 75 Page 44

Instead of subtracting a negative number, you can add.

- 10

Practice makes perfect

Let's perform the subtraction.

- 37 - (- 27)

SubNeg

a-(- b)=a+b

- 37+27

AddTerms

Add terms

- 10

We can see that subtracting a negative number is the same as adding its positive counterpart. Below we will demonstrate by finding - 37 and moving 27 units to the right on the number line.

The resulting position after moving to the right on the number line is the difference. We end up on - 10, which means that our previous calculations were correct.