Step 1

Difficulty 1

1. Add Board: 60 + 23
2. Add Board: 30 + 70
3. Add Board: 40 + 60
4. Add Board: 63 + 20
5. Adding tens: 26 + ? = 36
6. Adding tens: 46 + ? = 56
7. Adding tens: 64 + ? = 94
8. Changing numbers 136 to 140
9. Changing numbers 122 to 130
10. Changing numbers 154 to 160
11. Changing numbers 188 to 190
12. Changing numbers 177 to 180
13. On the board 963 + 5 = ?
14. On the board 242 + 6 = ?
15. On the board 781 + 8 = ?
16. On the board 427 + 2 = ?
17. On the board 113 + 4 = ?
18. On The Board 135+100
19. Add Board: 45 + 34 = ?
20. Add Board: 67 + 12 = ?
21. Add Board: 32 + 65 = ?
22. 100 Zone: 95+7=? 101-?=99 ?+6=103
23. 100 Zone: 95+6=? 103-?=99 ?+6=104
24. 100 Zone: 98+7=? 105-?=98 ?+6=105
25. 100 Zone: 98+6=? 102-?=98 ?+5=103
26. 100 Zone: 98+3=? 101-?=97 ?+5=102
27. Changing Numbers 14 to 54
28. Changing Numbers 35 to 85
29. Number detectives *+109 = 113
30. Number detectives *+4 = 103
31. Number detectives *+5 = 103
32. Number detectives 95+*=101
33. Number detectives 97+*=103
34. Use The Pattern 3+5 30+50 300+500
35. Use The Pattern 3+6 30+60 600+300
36. Use The Pattern 2+4 20+40 200+400
37. Use The Pattern 3+2 30+20 200+300
38. Use The Pattern 6+2 60+20 600+200
39. Addition Chains 21 + 3 + 6 + 5, 60 + 4 + 3 + 2
40. Addition Chains 33 + 4 + 10 + 5, 28 + 3 + 9 + 8
41. Addition Chains 23 + 5 + 4 + 9, 60 + 8 + 3 + 10
42. Addition Chains 95 + 4 + 2 + 12, 94 + 3 + 3 + 7
43. Addition Chains 100 + 5 + 5 + 7, 99 + 3 + 6 + 2
44. Beyond 90: 98 + 4
45. Beyond 100: 104 + 7
46. Beyond 110: 119+3
47. Beyond 120: 128+6
48. Beyond 130: 139 + 5
49. Number detectives: 60+?, 50+?, 75+?=100
50. Taking tens: 40 - 30 = ?
51. Taking tens: 50 - 20 = ?
52. Taking tens: 80 - 40 = ?
53. Taking tens: 70 - 10 = ?
54. Taking tens: 70 - 40 = ?
55. Taking tens: 40 - 30 = ?
56. Anyone for a burger: $20 - ($4 + $6)
57. Anyone for a burger: $20 - ($5 + $6)
58. Anyone for a burger: $20 - ($6 + $5)
59. Anyone for a burger?: $20 - ($4 + $6)
60. Bargain Basement: $15 - ($8 + $6)
61. Takeaway board 87-53
62. Takeaway board 29-15
63. Takeaway board 45-21
64. Takeaway board 77-34
65. Takeaway board 18-12
66. Use the pattern: 9-5, 90-50, 900-500
67. Use the pattern: 8-5, 80-50, 800-500
68. Use the pattern: 6-2, 60-20, 600-200
69. Takeaway board: 65-34
70. Takeaway board: 48-26
71. Taking Tens: 44 - 20
72. Taking Tens: 68 - 30
73. Subtract.chains 32 - 4 - 7 - 4, 45 - 2 - 10 - 5
74. Spot the difference: 102 & 97, 27 & 19, 100 & 60
75. Write the missing number: 7 + ? + 14 = 30
76. Write the missing number: 15 + 4 + ? = 30
77. Write the missing number: 12 + 10 + ? = 30
78. Write the missing number: 15 + 5 + ? = 30
79. Write the missing number: 18 + 8 + ? = 30
80. Write the missing number: 5 + 5 + ? = 30
81. Number Detectives: ? - 15 = 10
82. Number Detectives: ? - 9 = 21
83. Number Detectives: 30 - 17 = ?
84. Number Detectives: 30 - 14 = ?
85. Number Detectives: 30 - ? = 12
86. Number Detectives: 40 - ? = 29
87. Take Ten 42 - 10
88. Subtract 2, 12 from 100
89. Subtract 3, 13 from 100
90. Subtract 5, 15 from 100
91. Subtract 7, 17 from 100
92. Subtract 8, 18 from 100
93. Subtract 4, 14 from 100
94. Find first number: After I count back 5, the new number is 299. Where did I start?
95. Find first number: After I count back 4, the new number is 197. Where did I start?
96. Find first number: After I count back 6, the new number is 395. Where did I start?
97. Find first number: After I count back 7, the new number is 596. Where did I start?
98. Find first number: After I count back 8, the new number is 95. Where did I start?
99. Subtracting tens: 88 - ? = 48
100. Subtracting tens: 57 - ? = 27
101. Subtracting tens: 44 - ? = 24
102. The Mysteries of 40!: 40-?=31, 40-?=33, 40-?=30
103. The Mysteries of 40!: 40-?=51, 40-?=38, 40-?=32
104. The Mysteries of 40!: 40-?=29, 40-?=31, 40-?=33
105. The Mysteries of 40!: 40-?=28, 40-?=32, 40-?=18
106. The Chicken Story: forty-one - thirty-three
107. The Chicken Story: seventy-six - sixty-five
108. Emma at the shop: 25c + 15c
109. Charlotte at the shop: 60c + 25c
110. Marjorie at the shop: 70c + 15c
111. Felicity at the shop: 50c + 45c