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7th grade

Course: 7th grade > Unit 3

Lesson 2: Adding negative numbers fluently
Math
7th grade
Integers: addition and subtraction
Adding negative numbers fluently
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Adding negative numbers review

Google Classroom
Review the basic of adding negative numbers and try some practice problems.

Adding negative numbers with a number line

Adding 2 negative numbers

Lets add −6+(−7).
Step 1: Start at the first number, in this case −6:
Step 2: Move 7 more places to the left. We move 7 to the left because adding negative 7 decreases our number by 7.
−6+(−7) takes us to −13 on the number line.
−6+(−7)=−13

Adding a negative number and a positive number

Lets add −8+3.
Step 1: Start at the first number, in this case −8:
Step 2: Move 3 places to the right. We move 3 to the right because adding positive 3 increases our number by 3.
−8+3 takes us to −5 on the number line.
−8+3=−5
Want to learn more about adding negative numbers? Check out this video.

Practice

Problem 1
Add.
5+(−4)=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi

Want to try some more adding negative numbers problems? Check out this exercise.

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