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Adding Integers

  • Adding Integers with Opposite Signs
    1. Find the absolute value of each integer
    2. Subtract lesser absolute value from greater
    3. Difference takes the sign of the integer with the greater absolute value

Adding Integers

- 20 + ( - 17) =
- 37
99 + ( - 37) =
  • 99 - 37 =
62
- 75 + ( - 12) =
  • − 75 − 12 =
- 87
- 24 + 15 =
- 9
- 37 + 4 + ( - 20) + ( - 13) =
  • − 37 + 4 − 20 − 13 =
  • − 33 − 20 − 13 =
  • − 53 − 13 =
- 66
| - 16| - 18 + ( - 2) =
  • 16 − 18 − 2 =
  • − 2 − 2 =
- 4
3|9 - 14 + ( - 2)| + ( - 9) =
  • 3|9 − 14 − 2| − 9 =
  • 3| − 5 − 2| − 9 =
  • 3| − 7| − 9 =
  • 3(7) − 9 =
  • 21 − 9 =
12
| - 6 + ( - 4)|2 - 18 ÷ 3 =
  • | − 6 − 4|2 − 18 ÷3 =
  • | − 10|2 − 18 ÷3 =
  • (10)2 − 18 ÷3 =
  • 20 − 6 =
14
A hole is 31 inches deep. Jason digs the hole 9 more inches. How deep is the hole under the ground now?
  • − 31 + ( − 9) =
  • − 40
40 inches
A submarine is 75 feet below the surface of the water. It moves 25 feet lower. How many feet is the submarine below the surface of the water?
  • − 75 + ( − 25) =
  • − 100
100 feet

*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.

Answer

Adding Integers

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • What You'll Learn and Why 0:05
    • Topics Overview
  • Vocabulary 0:26
    • Integers
  • Adding Positive Integers 0:55
    • Example : -3 + -7
    • Example : +11 + 8
    • Example : 2 + (+6)
  • Adding Negative Integers 1:43
    • Example: -3 + -7
    • Example: -21 + -3
    • Example: -11 + (-4)
  • Adding Integers with Opposite Signs 3:01
    • Using a Number Line: -8 + 10
    • Using a Number Line: 4 + (-6)
  • Adding Integers with Opposite Signs 5:39
    • Using Absolute Value: -18 + 7
  • Extra Example 1: Adding Integers 6:33
  • Extra Example 2: Adding Integers 7:23
  • Extra Example 3: Money Problem 8:46
  • Extra Example 4: Measurement Problem 9:15