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3. 1-2 Adding and Subtracting Integers

4. Video Tutor Help Finding absolute valueFinding absolute value (1-2) Adding integers using rulesAdding integers using rules (1-2a and 1-2) Subtracting integersSubtracting integers (1-2a and 1-2) Brain Pop Adding and Subtracting Integers Adding Integers Adding Integers with a Number Line Subtracting Integers Khan Academy Adding integers Subtracting integers

5. Video Tutor Help Finding absolute value Comparing and ordering integers using absolute value or a number line Adding integers using rules Subtracting integers Subtracting integers to solve problems Adding integers using a number line Multiplying integers Dividing integers to solve problems Writing a fraction as a terminating decimal Writing a fraction as a repeating decimal Ordering fractions and decimals Writing terminating decimals as fractions Ordering rational numbers

6. Worksheets Daily Notetaking Guide Worksheets Version A Practice, Guided Problem Solving Lesson 1-2 Practice 1-2 Guided Problem Solving 1-2

7. Vocabulary Practice Vocabulary 1A: Graphic Organizer Vocabulary 1B: Reading Comprehension Vocabulary 1C: Reading/Writing Math Symbols Vocabulary 1D: Visual Vocabulary Practice Vocabulary 1E: Vocabulary C Vocabulary 1F: Vocabulary Review Puzzle Vocabulary (Electronic) Flash Cards

8. Additional Lesson Examples Step-by-Step Examples Lesson 1-2

9. Lesson Readiness Lesson Quiz Problem of the Day Lesson 1-2

14. When addends have the same sign, add. Use their sign with the sum. -2 + (-5) = -7

15. When addends have different signs, subtract. Use the sign of the greater addend. 8 + (-9) = -1

16. Add integers with different signs To add integers with different signs, subtract their absolute values. Give the result the same sign as the integer with the greater absolute value.

17. Example 2-1a Find. Start at zero. Move three units to the right. From there, move four more units to the right. Answer: 3 4 Add integers on a Number Line

18. Example 4-1a Find Method 1 Use a number line. Move 8 units to the left. From there, move 4 units left. Start at zero. Add Integers with the Same Sign

19. Example 4-1a Method 2 Use counters. Answer: So,

20. Example 4-2a Add and Find Both numbers are negative, so the sum in negative. Answer: –26 Add Integers with the Same Sign

21. Example 4-3a Method 2 Use counters. Answer: So,

22. Example 4-4a Find Method 1 Use a number line. Move 5 units left. From there, move 9 units right. Start at zero. Add Integers with Different Signs

23. Example 4-4a Method 2 Use counters. Answer: So,

24. Example 4-5a To find subtract from Find The sum is positive because > Answer: 17 Add Integers with Different Signs

25. Find. Example 2-2a Answer: –9 Add and. Both numbers are negative, so the sum is negative. Add Integers with the Same Sign

26. Find. Example 2-4a Answer: 1 To find –9 + 10, subtractfrom. The sum is positive because Add Integers with Different Signs

27. Example 2-4b Answer: –7 Find. To find 8 + (–15), subtract from The sum is negative because Add Integers with Different Signs

30. Start at 0. Move 1 unit right. Start at 0. Move 3 units left. Use a number line to find each sum. Adding and Subtracting Integers LESSON 1-2 a. (–3) + 1 b. 1 + (–3) The sum is –2. Then move 1 unit right. Then move 3 units left. Additional Examples

32. Find each sum. Adding and Subtracting Integers LESSON 1-2 a. 24 + (–6) b. –12 + (–19) 24 + (–6) = 18 Since 24 has a greater absolute value, the sum is positive. |24| – |–6|Find the difference of the absolute values. Since both integers are negative, the sum is negative. –12 + (–19) = –31 Additional Examples

33. Find. Example 2-3a Start at zero. Move 7 units to the right. From there, move 11 units to the left. Answer: 7 –11 Add Integers on a Number Line

34. Find. Example 2-3b Start at zero. Move 2 units to the left. From there, move 9 units to the right. Answer: –2 9 Add Integers on a Number Line

35. Example 4-3a Find Method 1 Use a number line. Move 4 units right. From there, move 6 units left. Start at zero. Add Integers with Different Signs

37. To subtract an integer, add its opposite. 3 – 6 4 – (-9) becomes 3 + (-6) = -3 becomes 4 + 9 = 13

39. Example 3-1a Simplify. Answer: –5 Find. To subtract 14, add –14. Subtract a Positive Integer

40. Example 3-1b Answer: –18 Simplify. Find. To subtract 8, add –8. Subtract a Positive Integer

41. Find. Example 3-2a Answer: 19 Simplify. To subtract –4, add 4. Subtract a Negative Integer

42. Find. Example 3-2b Answer: –3 Simplify. To subtract –7, add 7. Subtract a Negative Integer

43. Example 5-1a Find To subtract 6, add Add. Answer: –4 Subtract a Positive Integer

44. Example 5-2a Find Add. Answer: –12 To subtract 5, add Subtract a Positive Integer

45. Example 5-3a Find Add. Answer: 19 To subtract –8, add 8. Subtract a Negative Integer

46. Example 5-4a Find Add. Answer: 3 To subtract –9, add 9. Subtract a Negative Integer

47. Find each difference. Adding and Subtracting Integers LESSON 1-2 b. –7 – 2 a. 5 – (–3) 5 – (–3) = 5 + (3)Add the opposite of –3, which is 3. = 8Simplify. –7 – 2 = –7 + (–2)Add the opposite of 2, which is –2. = –9Simplify. Additional Examples

48. Find each difference. Adding and Subtracting Integers LESSON 1-2 b. –1 – 5 = a. –3 – (–8) = = –6 = 5 Simplify. –1 – 5 = –1 + (–5) –3 – (–8) = –3 + 8 Add the opposite. Additional Examples

50. Recorded temperatures at Amundsen-Scott Station in Antarctica have ranged from a low of – 89°F to a high of –13°F. Find the difference. Adding and Subtracting Integers LESSON 1-2 Subtract the low temperature from the high temperature. The temperature range at Amundsen-Scott Station is 76°F. –13 – (–89) = –13 + 89 Add the opposite of –89, which is 89. = 76Simplify. Additional Examples