1. Add. 1. 2 + 32. 7 + 4 3. 8 + 54. 17 + 12 Name the integer that corresponds to each point. 5. A6. B 5 11 –3 2913 5 Do Now

2. 2/6/2015 7-3 C Adding Integers

3. Move right on a number line to add a positive integer. Move left on a number line to add a negative integer. Adding Integers on a Number Line

4. Parentheses are used to separate addition, subtraction, multiplication, and division signs from negative integers. –2 + (–5) = –7 Writing Math

5. Example 1 Write the addition modeled on each number line. A. B. –1 0 1 2 3 4 5 6 5 + (–4) The addition modeled is 5 + (–4) = 1. –5 –4 –3 –2 –1 0 1 2 3 4 (–4) +7 The addition modeled is –4 + 7 = 3.

6. Example 2 Write the addition modeled on each number line. C. 3 + (–5) The addition modeled is 3 + (–5) = –2. –4 –3 –2 –1 0 1 2 3 4

7. Example 3 Find the sum. –3 + (–2) –6 –5 –4 –3 –2 –1 0 1 –3+ (–2) –3 + (–2) = –5 Think:

8. Take the sign of the LARGER number and subtract!

9. Example 4 Find the sum. 6 + (–8) 6 + (–8) = –2 +(–8) 6 –3 –2 –1 0 1 2 3 4 5 6 7 Think:

10. Example 5 Evaluate y + (–2) for y = 7. y + (–2)Write the expression. 7 + (–2)Substitute 7 for y. 5Add.

11. Example 6 A sunken ship is 12 m below the sea level. A search plane flies 35 m above the sunken ship. How far above the sea is the plane? The ship is 12 m below the sea level and the plane is 35 m above the ship. –12 + 35 23 The plane is 23 m above the sea.

12. Find each sum. 1. 7 + (–3) 2. –5 + 2 3. –8 + (–4) 4. Evaluate x + 5 for x = –4. 5. At midnight on a winter night, the temperature was –12°F. By 10 A.M. the temperature had risen 42°F. What was the new temperature? –3 4 –12 1 30°F Exit Ticket

13. 1. Identify the sum. 13 + (–5) A. 8 B. –8 C. 18 D. –18

14. 2. Identify the sum. –12 + 5 A. 7 B. –7 C. 17 D. –17

15. 3. Identify the sum. –18 + (–5) A. 13 B. –13 C. 23 D. –23

16. 4. The basement of a building is 10 feet below the ground level. The height of the building including the basement is 69 feet. What is the height of the building from the ground level? A. 79 ft B. 69 ft C. 64 ft D. 59 ft

17. Homework Adding Integer W.S. Enjoy the weekend!