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) |