Step 3

Difficulty 3

1. Add these 3 numbers: 9+10+4
2. Add it up: 69+23
3. Add it up: 46+26
4. Add it up: 37+24
5. Add it up: 28+25
6. Changing Numbers 29 to 34
7. Changing Numbers 67 to 78
8. Changing Numbers 98 to 101
9. Changing Numbers 87 to 92
10. Changing Numbers 59 to 63
11. Changing Numbers 96 to 101
12. Add It Up: Addition with regrouping 246+8
13. Add It Up: Addition with regrouping 289+4
14. Add It Up: Addition with regrouping 545+8
15. Add It Up: Addition with regrouping 637+5
16. Add It Up: Addition with regrouping 124+7
17. Changing numbers: 12 + 10, +11, +111
18. Changing numbers: 28 + 10, +11, +111
19. Changing numbers: 49 + 10, +11, +111
20. Changing numbers: 88 + 10, +11, +111
21. Changing numbers: 29 + 10, +11, +111
22. Use the pattern: 4+9, 40+90, 400+900
23. Use the pattern: 1+7, 10+70, 100+700
24. On the Board *8 + 51 = 7*
25. Double up & add: Double 9, + 3, + 10
26. Double up & add: Double 10, + 6, + 10
27. Adding Tens: 416 + 50 = *
28. Adding Tens: 542 + 50 = *
29. Add Hundreds: 100+280
30. Add Hundreds: 200+43
31. Adding Tens: * + 726 = 786
32. Adding Tens: * + 314 = 394
33. Number Detectives: 100 Pairs 85 + ?, 75 + ?, 45 +?= 100
34. The Nine Family: 53 + 9, + 19 + 29
35. The Nine Family: 47 + 9, + 19 + 29
36. The Nine Family: 38 + 9, + 19 + 29
37. The Nine Family: 55 + 9, + 19, + 29
38. The Nine Family: 42 + 9, + 19, + 29
39. Anyone for a burger?: $5+$6+$4
40. Anyone for a burger?: $5+$6+$1+$3
41. Add It Up: Addition with regrouping 45 + 17
42. Add It Up: Addition with regrouping 63 + 28
43. Add It Up: Addition with regrouping 34 + 48
44. Add It Up: Addition with regrouping 29 + 52
45. Add It Up: Addition with regrouping 46 + 37
46. Add It Up: Addition with regrouping 968+ 5
47. Add It Up: Addition with regrouping 457+7
48. Add It Up: Addition with regrouping 213+9
49. Add It Up: Addition with regrouping 518+6
50. Add It Up: Addition with regrouping 812+ 8
51. True or False?: 12 + 14 = 26
52. True or False?: 19 + 13 = 34
53. True or False?: 17 + 19 = 36
54. True or False?: 14 + 17 = 33
55. True or False?: 12 + 13 = 25
56. Use the pattern: 5+2,50+20, 500+200=?
57. Use the pattern: 5+4,50+40, 500+400=?
58. Use the pattern: 7+1,70+10, 700+100=?
59. Use the pattern: 2+3,20+30, 200+300=?
60. Use the pattern: 3+8,30+80, 300+800=?
61. Make 100: 50, 20 & ?
62. Make 100: 60, 20 & ?
63. Make 100: 10, 40 & ?
64. Make 100: 10, 30 & ?
65. Make 100: 60, 40 & ?
66. Take it away: Subtraction with decomposition 45-8
67. Take it away: Subtraction with decomposition 43-7
68. Take it away: Subtraction with decomposition 62-8
69. Takeaway board: 3? - 14 = 23
70. Takeaway board: 2? - 13 = 13
71. Takeaway board: 4? - 22 = 27
72. Takeaway board: 5? - 26 = 32
73. Take it away: Subtraction with decomposition 24 - 18
74. Takeaway board 152-? = 144
75. Takeaway board 547-? = 538
76. Takeaway board 553-? = 546
77. Takeaway board 291-? 285
78. Takeaway board 742-? = 737
79. Eleven family: Subtract 1, 11 & 41 from 85
80. Eleven family: Subtract 1, 11 & 21 from 68
81. Write the missing number: 25 + 5 + ? = 35
82. Write the missing number: 25 + 1 + ? = 35
83. Write the missing number: 35 + 5 + ? = 50
84. Write the missing number: 35 + 7 + ? = 50
85. True or False: 100 - 47 = 33
86. Use the Pattern: 7-3, 37-3, 167-3=?
87. Use the Pattern: 9-5, 29-5, 249-5=?
88. Use the Pattern: 6-3, 36-3, 166-3=?
89. Use the Pattern: 8-1, 18-1, 128-1=?
90. Use the Pattern: 6-4, 46-4, 286-4=?
91. Hundreds takeaway 350-**=330
92. Hundreds takeaway 875-**=865
93. The Mysteries of 40!: 40-?=32, 40-?=29, 40-?=37
94. The Mysteries of 40!: 40-?=29, 40-?=38, 40-?=39
95. The Mysteries of 40!: 40-?=30, 40-?=33, 40-?=36
96. Subtraction chains: 30-4-10-8, 30-5-10-7
97. Subtraction chains: 30-4-16-8, 30-5-3-11
98. Subtraction chains: 30-8-6-12, 30-6-3-5
99. Subtraction chains: 30-3-4-13, 30-6-5-7
100. Subtraction chains: 30-10-9-4, 30-5-9-7
101. Take it away: Subtraction with decomposition 53 - 28
102. Take it away: Subtraction with decomposition 61 - 13
103. Take it away: Subtraction with decomposition 25 - 16
104. Take it away: Subtraction with decomposition 33 - 18
105. Take it away: Subtraction with decomposition 46 - 27
106. Same or Different: Answer 43
107. Same or Different: Answer 77
108. Same or Different: Answer 69
109. The Mysteries of 40! 40-14,23,19
110. The Mysteries of 40! 40-8,12,25
111. The Mysteries of 40! 40-20,15,9
112. The Chicken Story: thirty-six + fourteen
113. The Chicken Story: thirteen + nineteen
114. The Chicken Story: twenty-four + thirty-two
115. Jenni at the shop: $1 - (10c + 30c + 5c)
116. Liz at the shop: $1 - (10c + 40c + 5c)