2. Splash Screen

3. Select a hyperlink to go to the corresponding slides. Chapter Menu Are You Ready for Chapter 5? Lesson 1:Lesson 1: Add Tens Lesson 2:Lesson 2: Count On Tens and Ones Lesson 3:Lesson 3: Problem-Solving Strategy: Work Backward Lesson 4:Lesson 4: Regroup Ones as Tens Lesson 5:Lesson 5: Add One-Digit Numbers and Two-Digit Numbers Lesson 6:Lesson 6: Add Two-Digit Numbers Lesson 7:Lesson 7: Estimate Sums Lesson 8:Lesson 8: Add Three Two-Digit Numbers Lesson 9:Lesson 9: Problem-Solving Investigation: Choose a Strategy Chapter 5 Review

4. Introduction—Are You Ready 1

5. Introduction—Are You Ready 2

6. Introduction—Are You Ready 3

7. Introduction—End

8. Lesson 1—Get Ready 1 I will use addition facts to add tens.

9. Lesson 1—Get Ready 2

10. Lesson 1—Teach 4 + 5 What is the sum? 9

11. Lesson 1—Teach 40 + 50 Model the following using cubes:

12. Lesson 1—Teach 40 + 50 What is the sum? 90

13. Lesson 1—Teach What is the sum of 4 ones and 5 ones? 9

14. Lesson 1—Teach What is the sum of 4 tens and 5 tens? 90

15. Lesson 1—Check Add. 90 60 +30 20 +50 70

16. Lesson 1—Check Add. 50 10 +40 30 +30 60

17. Lesson 1—Check Add. 90 70 +20 50 +10 60

18. Lesson 1—End

19. Lesson 2—Get Ready 1 I will count on by tens and ones to find sums.

20. Lesson 2—Get Ready 2

21. Lesson 2—Teach Sara has 26 stickers. She gets 3 more.

22. How can Sara count on to find how many in all? Lesson 2—Teach Count on 3 from 26. 26 272829

23. How many stickers are there in all? Lesson 2—Teach 29 26 272829

24. What number sentence tells about Sara’s stickers? Lesson 2—Teach 26 + 3 = 29 26 272829

25. Lesson 2—Teach Tom also has 26 stickers. He gets 30 more.

26. Lesson 2—Teach How can Tom count on to find how many in all? Count on by tens from 26. 26 36 46 56

27. How many stickers are there in all? Lesson 2—Teach 56 26 36 46 56

28. What number sentence tells about Tom’s stickers? Lesson 2—Teach 26 36 46 56 26 + 30 = 56

29. Do Sara and Tom still have the same number of stickers? Lesson 2—Teach no Sara’s StickersTom’s Stickers

30. Why not? Lesson 2—Teach Tom added more. Sara’s StickersTom’s Stickers

31. Lesson 2—Check

32. Count on to add. Write the sum. 39 34 + 5 57 +20 77

33. Lesson 2—Check Count on to add. Write the sum. 93 63 +30 42 + 7 49

34. Lesson 2—Check Count on to add. Write the sum. 19 17 + 2 25 +60 85

35. Lesson 2—End

36. Lesson 3—Get Ready 1 I will work backward to solve problems.

37. Lesson 3—Get Ready 2

38. Lesson 3—Teach

39. What do I need to know? Underline what you know.

40. Lesson 3—Teach What do I need to find? Circle the question.

41. Lesson 3—Teach How will you solve this problem? Work backward.

42. Lesson 3—Teach Work backward to solve this problem.

43. Lesson 3—Teach What do we already know? Patty has 2 cards. Hana has 3 cards. Eduardo has 44 cards.

44. Lesson 3—Teach Start with the number of cards Eduardo has now. Add the cards he gave away.

45. Lesson 3—Teach 47 Eduardo’s and Hana’s cards 44 cards he has now + 3 Hana’s cards

46. Lesson 3—Teach 47 Eduardo’s and Hana’s cards + 2 Patty’s cards 49 number of cards Eduardo had in the beginning

47. Lesson 3—Teach Eduardo started with 49 cards.

48. Lesson 3—Teach Look back. Does my answer make sense? yes; 2 + 3 = 5; 44 + 5 = 49

49. Lesson 3—Check Work backward to solve. Clint has 7 more problems to do in math. He already did 30. How many problems did he have at the start? 37 problems

50. Lesson 3—End

51. Lesson 4—Get Ready 1 I will regroup to find sums.

52. Lesson 4—Get Ready 2 regroup

53. Vocab 1

54. Lesson 4—Get Ready 3

55. Lesson 4—Teach 7 + 6 add How can you find out how many cubes there are in all?

56. Lesson 4—Teach 7 + 6 If there are ten or more ones on the workmat, you can regroup them as one ten. regroup

57. Lesson 4—Teach 7 + 6 Are there enough to regroup? regroup yes

58. Lesson 4—Teach 7 + 6 How many ones are still in the ones section? 3

59. Lesson 4—Teach 7 + 6 How many tens are in the tens section? 1

60. Lesson 4—Teach 7 + 6 What number is one ten and three ones? 13

61. Lesson 4—Check

62. 25 + 8 ___ tens ___ ones Did you regroup? What is the sum? 213 yes 33 Add the ones. Add the tens.

63. Lesson 4—Check 12 + 5 ___ tens ___ ones Did you regroup? What is the sum? 17 no 17 Add the ones. Add the tens.

64. Lesson 4—End

65. Lesson 5—Get Ready 1 I will add one-digit and two-digit numbers.

66. Lesson 5—Get Ready 2

67. Lesson 5—Teach How many cubes? 16

68. Lesson 5—Teach How many more? 5

69. Lesson 5—Teach How many ones altogether? 11

70. Lesson 5—Teach Is 11 more than 10? yes

71. Lesson 5—Teach Now how many ten-rods altogether? 2

72. Lesson 5—Teach How many cubes? 1

73. Lesson 5—Teach What is the number? 21

74. Lesson 5—Teach How do you know? There are two groups of 10 that equal 20 plus one group of 1. That’s 21.

75. Lesson 5—Check Add. 34747 4 1 1 28787 3 5 1

76. Lesson 5—End

77. Lesson 6—Get Ready 1 I will add two-digit numbers.

78. Lesson 6—Get Ready 2

79. Lesson 6—Teach Which digits belong in the tens place? 24 +17 2121

80. Lesson 6—Teach Which digits belong in the ones place? 24 +17 2121 4747

81. Lesson 6—Teach Add the ones. 2121 4747 1 1

82. Lesson 6—Teach Add the tens. 4 1 1 2121 4747

83. Lesson 6—Check

84. Use the workmat to add. 2424 6565 7 1 1

85. Lesson 6—Check Use the workmat to add. 4343 7878 8 5 1

86. Lesson 6—Check Use the workmat to add. 2525 4343 7

87. Lesson 6—End

88. Lesson 7—Get Ready 1 I will estimate the sum.

89. Lesson 7—Get Ready 2 round

90. Vocab 2

91. Lesson 7—Get Ready 3

92. Lesson 7—Get Ready 4

93. Lesson 7—Teach José has two containers of marbles. He has 13 marbles in one container and 29 in the other. He thinks he has about 40 marbles. How can we use estimation to decide if José is right? Round both numbers. Then add them to find an estimated sum.

94. Lesson 7—Teach To which ten is 13 rounded?rounded 10

95. Lesson 7—Teach To which ten is 29 rounded?rounded 30

96. Lesson 7—Teach What is the estimated sum? 10 + 30 = 40

97. Lesson 7—Teach Was José’s estimate reasonable? yes

98. Lesson 7—Check

99. +__ 40 50 90 Lesson 7—Check Round each addend to the nearest ten. Estimate the sum. 44 +53

100. +__ 50 40 90 Lesson 7—Check Round each addend to the nearest ten. Estimate the sum. 48 +42

101. Lesson 7—End

102. Lesson 8—Get Ready 1 I will add three two-digit numbers.

103. Lesson 8—Get Ready 2

104. Lesson 8—Get Ready 3

105. Lesson 8—Teach Model the addends on the workmat. 38 12 +25 312312 825825

106. Lesson 8—Teach Add two addends. 38 12 +25 312312 825825 10

107. Lesson 8—Teach Add this sum to the third addend. 38 12 +25 312312 10 5 1 825825

108. Lesson 8—Teach Add the tens. 38 12 +25 312312 5 1 825825 7 75

109. Lesson 8—Check Find the sum. 24 16 +40 80 13 25 +33 71

110. Lesson 8—Check Find the sum. 28 12 +52 92 21 24 +12 57

111. Lesson 8—End

112. Lesson 9—Get Ready 1 I will choose a strategy to solve a problem.

113. Lesson 9—Get Ready 2

114. Lesson 9—Teach What do you know? Underline what you know?

115. Lesson 9—Teach What do you need to find? Circle the question.

116. Lesson 9—Teach

117. How will you solve this problem?

118. Lesson 9—Teach One way to solve this problem is to guess and check.

119. Lesson 9—Teach What do we already know? Two numbers have a sum of 16 and a difference of 4.

120. Lesson 9—Teach How can we make a guess about the answer? Try different numbers and check the sum and difference.

121. Lesson 9—Teach The sum is right. 8 + 8 16 8 – 8 0 The difference is not 4. This answer is not correct.

122. Lesson 9—Teach The sum is right. 9 + 7 16 9 – 7 2 The difference is not 4. This answer is not correct.

123. Lesson 9—Teach The sum is right. 10 + 6 16 10 – 6 4 The difference is 4. This answer is correct.

124. Lesson 9—Teach 10 and 6 are the numbers.

125. Lesson 9—Teach Look back. Does my answer make sense? yes

126. Lesson 9—Check Choose a strategy. Solve. Together Tony and Kerina have 9 pets. Tony has 3 more pets than Kerina. How many pets does Tony have? How many pets does Kerina have? Tony has 6 pets and Kerina has 3 pets.

127. Lesson 9—End

128. Chapter Review 1 To ____________ is to change the value of a number into one that is easier to work with. To ____________ is to take apart a number and build it in another way. regroup round Complete the sentences. round regroup

129. Chapter Review 2 Count on to add. Write the sum. 18 12 + 6 45 +50 95

130. Chapter Review 3 Round each addend to the nearest ten. Estimate the sum. +__ 10 20 30 14 +18

131. Chapter Review 4 Find the sum. 17 33 +24 74 12 12 +18 42

132. Chapter Review—End