1. Common Core State Standards
  2. Math
  3. Content
  4. Grade 3
  5. Operations And Algebraic Thinking
  6. Solve Problems Involving The Four Operations, And Identify And Explain Patterns In Arithmetic.

3.OA.8

Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.3

1. Changing Numbers - 55 to 550
2. Changing Numbers - 74 to 740
3. Word Wise: Double 6
4. Make 20: 7+4+?
5. Make 20: 11+5+?
6. Make 20: 8+9+?
7. Make 50: 20+10+?
8. Make 50: 20+10+?
9. Make 50: 20+10+?
10. Make 50: 20+10+?
11. Make 50: 20+10+?
12. Double Up and Add: Double 6 plus 4
13. Double Up and Add: Double 10 plus 7
14. Double Up and Add: Double 9 plus 2
15. Changing numbers 136 to 140
16. Changing numbers 122 to 130
17. Changing numbers 154 to 160
18. Changing numbers 188 to 190
19. Changing numbers 177 to 180
20. Make 30: 10 + 11 + ? = 30
21. Make 50: 20+10+?
22. Make 30: 19 + 2 + ? = 30
23. Make 30: 20 + 10 + ? = 30
24. Make 30: 16 + 4 + ? = 30
25. Make 30: 18 + 3 + ? = 30
26. Changing numbers: 24 changes to 33
27. Changing numbers: 19 changes to 28
28. Changing numbers: 13 changes to 21
29. Changing numbers: 9 changes to 17
30. Changing numbers: 8 changes to 17
31. Make 50: 40 + 4 + ?
32. Make 36: 20 + 14 + ?
33. Make 39: 30 + 6 + ?
34. Make 37: 12 + 20 + 5
35. Make 34: 10 + 22 + ?
36. Add three numbers: 14 + 12 + 8
37. Add three numbers: 11 + 14 + 5
38. Make 50: 39+7+? = 50
39. Make 50: 39+5+? = 50
40. Make 50: 35+5+? = 50
41. Make 50: 38+10+? = 50
42. Make 50: 42+6+? = 50
43. Changing Numbers 98 to 105
44. Changing Numbers 97 to 103
45. Changing Numbers 97 to 102
46. Changing Numbers 99 to 103
47. Changing Numbers 42 to 62
48. Changing Numbers 63 to 93
49. Changing Numbers 14 to 54
50. Changing Numbers 137 to 157
51. Changing Numbers 35 to 85
52. Number detectives 45+*=100
53. Number detectives 75+*=100
54. Number detectives 85+*=100
55. Number detectives 35+*=100
56. Number detectives 5+*=100
57. Spot the difference between 30 and 15.
58. Spot the difference between 12 and 25.
59. Spot the difference between 30 and 10.
60. Spot the difference between 40 and 10.
61. Spot the difference between 20 and 39.
62. Spot the difference between 18 and 25.
63. Spot the difference between 25 and 34.
64. Spot the difference between 19 and 31.
65. Spot the difference between 19 and 42.
66. Spot the difference between 36 and 15.
67. Write the missing number: 20 + 3 + ? = 30
68. Write the missing number: 12 + ? + 10 = 30
69. Write the missing number: 15 + ? + 5 = 30
70. Write the missing number: 9 + ? + 12 = 30
71. Write the missing number: ? + 5 + 4 = 30
72. Write the missing number: 15 + ? + 6 = 30
73. Write the missing number: 20 + 3 + ? = 30
74. Spot the difference: 60 & 40, 12 & 18, 100 & 95
75. Spot the difference: 20 & 14, 17 & 9, 80 & 73
76. Spot the difference: 100 & 30, 19 & 11, 30 & 24
77. Spot the difference: 50 & 41, 100 & 92, 101 & 98
78. Spot the difference: 102 & 97, 27 & 19, 100 & 60
79. Changing Numbers 55-37=?
80. Changing Numbers 65-54=?
81. Changing Numbers 48-22=?
82. Changing Numbers 36-16=?
83. Changing Numbers 51-28=?
84. Changing Numbers 42-32=?
85. Write the missing number: 7 + ? + 14 = 30
86. Write the missing number: 15 + 4 + ? = 30
87. Write the missing number: 12 + 10 + ? = 30
88. Write the missing number: 15 + 5 + ? = 30
89. Write the missing number: 18 + 8 + ? = 30
90. Write the missing number: 5 + 5 + ? = 30
91. Find first number: After I count back 5, the new number is 299. Where did I start?
92. Find first number: After I count back 4, the new number is 197. Where did I start?
93. Find first number: After I count back 6, the new number is 395. Where did I start?
94. Find first number: After I count back 7, the new number is 596. Where did I start?
95. Find first number: After I count back 8, the new number is 95. Where did I start?
96. Double up: 2 x 3
97. Double up: 2 x 5
98. Double up: 2 x 6
99. Double up: 2 x 4
100. Double up: 2 x 7
101. Double up: Double 2
102. Double up: Double 8
103. Double up: Double 10
104. Double up: Double 6
105. Double up: Double 4
106. Number detectives: Product = 12, one number is 6. What is the other number?
107. Number detectives: Product = 20, one number is 4. What is the other number?
108. Number production: Put the correct ending on each multiplication sentence
109. Double up: Double 15, 150
110. Double up: Double 35, 350
111. Double up: Double 16, 160
112. Double Up: Double 25, 250
113. Double Up: Double 9, 900
114. What Was I Thinking? - find original number after operations
115. Enid the Elephant's Equations - equivalent to 8 + 4
116. Enid the Elephant's Equations - equivalent to 6 + 5
117. Enid the Elephant's Equations - equivalent to 7 + 7
118. Cards On The Table - select correct 2 cards
119. The Chicken Story: forty + thirty
120. The Chicken Story: sixty + thirty
121. The Chicken Story: seventy-nine - seventy-three
122. The Chicken Story: fifty + twenty
123. 19 go to Waterworld: 5+4+3+?
124. Make 50: 32+8+? = 50
125. N/D: Number halfway between 11 and 15
126. N/D: Number half-way between 7 and 11
127. N/D: Number halfway between 17 and 21
128. N/D: Number halfway between 23 and 27
129. Sum money: 4x5c + 1x10c
130. Food Times: 5 children x 3 wieners
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