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Adding Integers: Course 3 Lessons

Learn various methods to add integers with helpful examples and quizzes to practice. Understand how to use number lines and absolute value to solve problems. Master the art of integer addition effortlessly.

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Adding Integers: Course 3 Lessons

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  1. 1-4 Adding Integers Course 3 Warm Up Problem of the Day Lesson Presentation

  2. 1-4 Adding Integers –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 Course 3 Warm Up Graph each number on a number line. 1. –5 2. 7 3. –4 4. 0

  3. 1-4 Adding Integers Course 3 Problem of the Day Start at (0, 0). Walk 3 blocks west and 2 blocks north. Then walk 4 blocks south and 1 block east. What are your coordinates? (–2, –2)

  4. 1-4 Adding Integers Course 3 Learn to add integers.

  5. 1-4 Adding Integers 2 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 Helpful Hint To add a positive number move to the right. To add a negative number move to the left. Course 3 Additional Example 1A: Using a Number Line to Add Integers Use a number line to find the sum. (–6) + 2 –6 You finish at –4, so (–6) + 2 = –4.

  6. 1-4 Adding Integers -3 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 Course 3 Additional Example 1B: Using a Number Line to Add Integers Use a number line to find the sum. –3 + (–6) –6 You finish at –9, so –3 + (–6) = –9.

  7. 1-4 Adding Integers 7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 Course 3 Check It Out: Example 1A Use a number line to find the sum. (–3) + 7 –3 You finish at 4, so (–3) + 7 = 4.

  8. 1-4 Adding Integers 4 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 Course 3 Check It Out: Example 1B Use a number line to find the sum. (–2) + 4 –2 You finish at 2, so (–2) + 4 = 2.

  9. 2-1 Adding Integers Think: Find the difference of 1 and –2 . Think: Find the difference of –8 and 5 . Course 3 Additional Example 2: Using Absolute Value to Add Integers Add. A. 1 + (–2) 1 + (–2) –1 2 > 1; use the sign of 2. B. (–8) + 5 (–8) + 5 –3 8 > 5; use the sign of 8.

  10. 1-4 Adding Integers Think: Find the sum of –2 and –4 . Course 3 Additional Example 2: Using Absolute Value to Add Integers Add. C. (–2) + (–4) (–2) + (–4) Same sign; use the sign of the integers. –6

  11. 1-4 Adding Integers Think: Find the difference of 3 and –6 . Think: Find the difference of –4 and 1 . Course 3 Check It Out: Example 2 Add. A. 3 + (–6) 3 + (–6) –3 6 > 3; use the sign of 6. B. (–4) + 1 (–4) + 1 –3 4 > 1; use the sign of 4.

  12. 1-4 Adding Integers Think: Find the sum of –6 and –7 . Course 3 Check It Out: Example 2C Add. C. (–6) + (–7) (–6) + (–7) Same sign; use the sign of the integers. –13

  13. 1-4 Adding Integers Think: Find the difference of –8 and 4 . Course 3 Additional Example 3: Evaluating Expressions with Integers Evaluate c + 4 for c = –8. c + 4 (–8) + 4 Replace c with –8. –8 + 4 = –4 8 > 4; use the sign of 8.

  14. 1-4 Adding Integers Think: Find the difference of –3 and 7 . Course 3 Check It Out: Example 3 Evaluate d + 7 for d = –3. d + 7 (–3) + 7 Replace d with –3. –3 + 7 = 4 7 > 3; use the sign of 7.

  15. 1-4 Adding Integers Course 3 Additional Example 4: Application Meka opened a new bank account. Find her account balance after the first four transactions listed below. Deposits: $200, $20 Withdrawals: $166, $38 Use a positive sign for deposits and a negative sign for withdrawals. 200 + 20 + (–166) + (–38) Group integers with same signs. (200 + 20) + (–166 + –38) Add integers within each group. 220 + (–204) 220 > 204; use the sign of 220. 16 Meka’s account balance after the first four transactions is $16.

  16. 1-4 Adding Integers Course 3 Check It Out: Example 4 Michael opened a new bank account. Find his account balance after the first four transactions listed below. Deposits: $175, $95 Withdrawals: $133, $65 Use a positive sign for deposits and a negative sign for withdrawals. 175 + 95 + (–133) + (–65) Group integers with same signs. (175 + 95) + (–133 + –65) Add integers within each group. 270 + (–198) 270 > 198; use the sign of 270. 72 Michael’s account balance after the first four transactions is $72.

  17. 1-4 Adding Integers Course 3 Insert Lesson Title Here Lesson Quiz: Part I Add. 1. –7 + (– 7) 2. 15 + (–9) + (–2) –14 4 Evaluate each expression for the given value of the variable. 3. 13 + r for r = –15 4. 2 + b + (–9) for b = –6 –2 –13

  18. 1-4 Adding Integers Course 3 Insert Lesson Title Here Lesson Quiz: Part II 5. On Monday, a local dog shelter had six dogs. By Friday they had found homes for three, but took in two more. Then how many dogs were in the shelter? 5 dogs

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