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• 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

- 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

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• Intro 0:00
• What You'll Learn and Why 0:05
• Topics Overview
• Vocabulary 0:26
• Integers
• Example : -3 + -7
• Example : +11 + 8
• Example : 2 + (+6)