2.NBT.5
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
| 1. | Which number is 10 more than 14? | |
| 2. | 10 less, 10 more than 30 | |
| 3. | 10 less, 10 more than 40 | |
| 4. | 10 less, 10 more than 50 | |
| 5. | 10 less, 10 more than 60 | |
| 6. | 2 less, 2 more than 38 | |
| 7. | 2 less, 2 more than 21 | |
| 8. | 2 less, 2 more than 47 | |
| 9. | 2 less, 2 more than 63 | |
| 10. | 2 less, 2 more than 74 | |
| 11. | 1 less, 1 more than 37 | |
| 12. | 1 less, 1 more than 45 | |
| 13. | 2 less, 2 more than 30 | |
| 14. | 5 less, 5 more than 80 | |
| 15. | 5 less, 5 more than 30 | |
| 16. | 10 less, 10 more than 38 | |
| 17. | 10 less, 10 more than 24 | |
| 18. | Add Board: 30 + 8 | |
| 19. | Add Board: 20 + 4 | |
| 20. | Add Board: 15 + 3 | |
| 21. | Add Board: 50 + 6 | |
| 22. | Add Board: 20 + 9 | |
| 23. | Add Board: 21 + 6 | |
| 24. | Add Board: 13 + 12 | |
| 25. | Add Board: 20 + 20 | |
| 26. | Add Board: 12 + 7 | |
| 27. | Add Board: 13 + 6 | |
| 28. | Number Detectives: ? + 10 = 32 | |
| 29. | Number Detectives: 10 + ? = 34 | |
| 30. | On the Board: 60+2 | |
| 31. | On the Board: 20+3 | |
| 32. | On the Board: 40+7 | |
| 33. | On the Board: 50+8 | |
| 34. | On the Board: 60+4 | |
| 35. | Word Wise: 15 added to 6 | |
| 36. | Adding tens: 42 + 10 = ? | |
| 37. | Three Up!: Add 3 to 60, 20, 50 | |
| 38. | Two Up!!: Add 2 to 23, 15, 37 | |
| 39. | Two Up!!: Add 2 to 29, 80, 12 | |
| 40. | Two Up!!: Add 2 to 14, 24, 44 | |
| 41. | One Up!: Add 1 to 65, 19, 42 | |
| 42. | Number Detectives: ? + 7 = 30 | |
| 43. | Number Detectives: ? + 24 = 30 | |
| 44. | Number Detectives: 10 + 20 = ? | |
| 45. | Number Detectives: 22 + ? = 30 | |
| 46. | Number Detectives: 21 + ? = 30 | |
| 47. | Addition Chains: 10 + 4 + 6 + 2, 11 + 2 + 3 + 4 | |
| 48. | Addition Chains: 4 + 5 + 5 + 2, 10 + 5 + 5 + 10 | |
| 49. | Addition Chains: 2 + 4 + 3 + 10, 12 + 1 + 2 + 7 | |
| 50. | Add board 40 + 14 = * | |
| 51. | Add board 56 + 11 = * | |
| 52. | Add board 71 + 18 = * | |
| 53. | Add board 45 + 23 = * | |
| 54. | Take 10: ? - 10 = 60 | |
| 55. | Subtraction Chain - 22-4=?-3=15 | |
| 56. | Subtraction Chain - ?-8=16-2=14 | |
| 57. | Subtraction Chain - 29-8=21-3=? | |
| 58. | Subtraction Chain - 26-5=21-4=? | |
| 59. | Subtraction Chain - ?-4=19-3=16 | |
| 60. | Mysteries of Thirty: 30-?=29, 30-?=24 | |
| 61. | Mysteries of Thirty: 30-?=21, 30-?=27 | |
| 62. | Mysteries of Thirty: 30-?=26, 30-?=22 | |
| 63. | The 20s zone: 22-2=?, 22-5=? | |
| 64. | The 20s zone: 21-1=?, 21-7=? | |
| 65. | The 20s zone: 23-3=?, 23-8=? | |
| 66. | The 20s zone: 25-5=?, 25-8=? | |
| 67. | The 20s zone: 26-6=?, 26-9=? | |
| 68. | The 20s zone: 23-3=?, 20-6=? | |
| 69. | The 20s zone: 24-4=?, 24-6=? | |
| 70. | The 20s zone: 22-2=?, 22-8=? | |
| 71. | The 20s zone: 23-3=?, 23-6=? | |
| 72. | The 20s zone: 27-7=?, 27-9=? | |
| 73. | The 20s Zone: Take 6 from 24 | |
| 74. | The 20s Zone: Take 8 from 24 | |
| 75. | The 20s Zone: Take 6 from 25 | |
| 76. | The 20s Zone: Take 4 from 21 | |
| 77. | The 20s Zone: Take 8 from 25 | |
| 78. | The 20s Zone: Take 9 from 23 | |
| 79. | The 20s Zone: Take 7 from 23 | |
| 80. | The 20s Zone: Take 8 from 26 | |
| 81. | The 20s Zone: Take 7 from 22 | |
| 82. | The 20s Zone: Take 8 from 27 |