Step 1

Difficulty 1

1. Number Detectives ? + 3 = 6
2. Add these 3 numbers: 8 + 3 + 2
3. Add these 3 numbers: 9 + 1 + 6
4. Add Board: 21 + 6
5. Add Board: 13 + 12
6. Add Board: 20 + 20
7. Add Board: 12 + 7
8. Add Board: 13 + 6
9. Who's going to Waterworld? 5+4+3+2
10. Now Add This! 26+21, 26+31
11. Add three numbers: 7 + 9 + 3
12. Add three numbers: 4 + 8 + 7
13. Add three numbers: 6 + 7 + 9
14. Add three numbers: 13 + 9 + 7
15. Add three numbers: 20 + 10 + 20
16. True or False?: 18 + 2 = 20
17. True or False?: 9 + 8 = 10
18. True or False?: 42 + 7 = 49
19. True or False?: 53 + 2 = 60
20. True or False?: 7 + 8 = 15
21. Same or Different: Click all the boxes with the answer 25.
22. Same or Different: Click all the boxes with the answer 37.
23. Same or Different: Click all the boxes with the answer 34.
24. Same or Different: Click all the boxes with the answer 26.
25. Same or Different: Click all the boxes with the answer 28.
26. Make 30: 20 + 7 + ? = 30
27. 100 grid: Start at 73. Add 7.
28. 100 grid: Start at 45. Add 8.
29. 100 grid: Start at 26. Add 5.
30. 100 grid: Start at 68. Add 4.
31. 100 grid: Start at 52. Add 7.
32. N/D Mysteries of 20! 17+, 11+, 15+
33. N/D Mysteries of 20! 7+, 10+, 8+
34. N/D Mysteries of 20! 6+, 9+, 3+
35. N/D Mysteries of 20! 20+, 5+, 2+
36. Anyone for a burger?: $5 + $6 + $2
37. Use the Pattern: 4 + 9, + 10, + 11
38. Use the Pattern: 5 + 9, + 10, + 11
39. Use the Pattern: 6 + 9, + 10, + 11
40. Use the Pattern: 7 + 9, + 10, + 11
41. Use the Pattern: 8 + 9, + 10, + 11
42. Three Up!: Add 3 to 60, 20, 50
43. Two Up!!: Add 2 to 23, 15, 37
44. Two Up!!: Add 2 to 29, 80, 12
45. Two Up!!: Add 2 to 14, 24, 44
46. One Up!: Add 1 to 65, 19, 42
47. Thinking in tens: Add 10, 19 to 19
48. Thinking in tens: Add 10, 11 to 14
49. Subtraction chain 9 - 1 = 8, 8 - 2 = ?
50. Subtraction chain 8 - 3 = 5, 5 - 2 = ?
51. Subtraction chain 6 - 2 = 4, 4 - 2 = ?
52. Subtraction chain 7 - 3 = 4, 4 - 1 = ?
53. Subtraction chain 9 - 2 = 7, 7 - 3 = ?
54. Number detectives: 14 - ? = 4
55. Number detectives: 11 - ? = 5
56. Number detectives: 10 - ? = 8
57. Number detectives: 13 - ? = 5
58. Number detectives: 14 - ? = 7
59. Card games: Which is lower, 4 + 2 or 6 + 1?
60. Card games: Which is lower, 7 + 3 or 5 + 4?
61. Card games: Which is lower, 6 + 4 or 2 + 3?
62. Card games: Which is lower, 4 + 3 or 1 + 9?
63. Card games: Which is higher, 4 + 5 or 5 + 1?
64. Write the missing number: 15 + 1 + ? = 20
65. Write the missing number: ? + 11 + 2 = 20
66. Write the missing number: 3 + 4 + ? = 20
67. Write the missing number: ? + 5 + 6 = 20
68. Write the missing number: 5 + 8 + ? = 20
69. Word Wise: Subtract 14 from 20
70. Word Wise: 20 take away 11
71. Word Wise: 14 take away 6
72. Word Wise: 11 less than 19
73. Word Wise: 13 less than 20
74. Word Wise: 11 less than 16
75. Write the missing number: 4 + 8 + ? = 20
76. Write the missing number: ? + 13 + 4 = 20
77. Write the missing number: 4 + ? + 6 = 20
78. Take 10: ? - 10 = 60
79. Subtraction chain 20 - 12 = ? - 6 = 2
80. Write in the missing number: ? + 13 + 5 = 21
81. True or False?: 29 - 7 = 23
82. True or False?: 28 - 5 = 21
83. True or False?: 24 - 2 = 20
84. True or False?: 9 - 4 = 5
85. True or False?: 17 - 2 = 15
86. True or False?: 15 - 3 = 10
87. True or False?: 8 - 5 = 2
88. True or False?: 27 - 4 = 23
89. True or False?: 25 - 5 = 20
90. Subtraction Chain - 27-20-13
91. Subtraction Chain - ?-4=21-2=19
92. Subtraction Chain - 27-4=?-6=17
93. Subtraction Chain - 28-7=21-5=?
94. Subtract from 100: 100 - 30, 40 & 20
95. Subtract from 100: 100 - 20, 30 & 70
96. Subtract from 100: 100 - 70, 20 & 40
97. Subtract from 100: 100 - 40, 90 & 50
98. Subtract from 100: 100 - 60, 20 & 100
99. Subtract 8 (from 16, 15, 12)
100. Subtract 6 (from 12, 11, 13)
101. Subtract 5 (from 14, 11, 8)
102. Subtract 7 (from 14, 16, 11)
103. Who's going to Waterworld? 2+4+3+8
104. Who's going to Waterworld? 4+4+2+5
105. Who's going to Waterworld? 2+3+3+10
106. Who's going to Waterworld? 7+3+2+3
107. Who's going to Waterworld? 5+4+5+3
108. 16 go to WaterWorld: 5+4+3+?
109. 17 go to Waterworld: 6+5+2+?
110. 14 go to Waterworld: 6+3+2+?
111. 18 go to WaterWorld: 3+3+2+?
112. 15 go to WaterWorld: 5+3+2+?
113. 16 go to Waterworld? 2+3+3+?
114. Card games: Which is higher, 5 + 4 or 3 + 7?
115. Card games: Which is higher, 3 + 5 or 4 + 8?
116. Card games: Which is higher, 5 + 9 or 6 + 4?
117. Card games: Which is higher, 4 + 6 or 9 + 3?
118. Card games: Which is lower, 9 + 3 or 6 + 7?
119. Card games: Which is lower, 2 + 6 or 4 + 2?
120. The 20s Zone: Take 6 from 24
121. The 20s Zone: Take 8 from 24
122. The 20s Zone: Take 6 from 25
123. The 20s Zone: Take 4 from 21
124. The 20s Zone: Take 8 from 25
125. The 20s Zone: Take 9 from 23
126. The 20s Zone: Take 7 from 23
127. The 20s Zone: Take 8 from 26
128. The 20s Zone: Take 7 from 22
129. The 20s Zone: Take 8 from 27