Use concrete materials to model the addition and subtraction of two or more numbers, with and without trading, and record the method used
1. | Now Add This! 34+11, 34+12 | |
2. | Now Add This! 19+20, 19+24 | |
3. | Now Add This! 52+20, 52+17 | |
4. | Now Add This! 33+19, 33+21 | |
5. | Add on tens: Add 10, 20 to 35 | |
6. | Add on tens: Add 10, 20 to 16. | |
7. | Add on tens: Add 10, 20 to 36 | |
8. | The 1 Family - Add 1, add 11 to 35 | |
9. | The 1 Family - Add 1, add 11 to 27 | |
10. | The 1 Family - Add 1, add 11 to 49 | |
11. | The 1 Family - Add 1, add 11 to 57 | |
12. | The 1 Family - Add 1, add 11 to 83 | |
13. | The Nine Family: 53 + 9, + 19 + 29 | |
14. | The Nine Family: 47 + 9, + 19 + 29 | |
15. | The Nine Family: 38 + 9, + 19 + 29 | |
16. | The Nine Family: 55 + 9, + 19, + 29 | |
17. | The Nine Family: 42 + 9, + 19, + 29 | |
18. | 100 grid: 41 take away 6 | |
19. | 100 grid: 53 subtract 8 | |
20. | 100 grid: 32 take away 5 | |
21. | 100 grid: 76 take away 7 | |
22. | 100 grid: 54 take away 8 | |
23. | 100 grid: 64 take away 9 | |
24. | 100 grid: 84 take away 8 | |
25. | 100 grid: 46 take away 9 | |
26. | 100 grid: 23 take away 7 | |
27. | 100 grid: 71 take away 8 | |
28. | 100 grid: 34 take away 6 | |
29. | 100 grid: 77 take away 9 | |
30. | Subtract from 30: 30 - 20, 7 & 12 | |
31. | Subtract from 30: 30 - 15, 10 & 6 | |
32. | Subtract from 30: 30 - 11, 5 & 21 | |
33. | Subtract from 30: 30 - 8, 30 & 14 | |
34. | Subtract from 30: 30 - 17, 30 & 5 | |
35. | The 9 family: Take 9, 19 & 29 from 57 | |
36. | The 9 family: Take 9, 19 & 29 from 65 | |
37. | The 9 family: Take 9, 19 & 29 from 72 | |
38. | The 9 family: Take 9, 19 & 29 from 44 | |
39. | The 9 family: Take 9, 19 & 29 from 36 | |
40. | Eleven family: Subtract 1, 11 & 21 from 5 | |
41. | Eleven family: Subtract 1, 11 & 41 from 85 | |
42. | Eleven family: Subtract 1, 11 & 31 from 77 | |
43. | Eleven family: Subtract 1, 11 & 21 from 68 | |
44. | Eleven family: Subtract 1, 11 & 71 from 96 | |
45. | Subtract 2, 12 from 100 | |
46. | Subtract 3, 13 from 100 | |
47. | Subtract 5, 15 from 100 | |
48. | Subtract 7, 17 from 100 | |
49. | Subtract 8, 18 from 100 | |
50. | Subtract 4, 14 from 100 | |
51. | The Chicken Story: forty + thirty | |
52. | The Chicken Story: seventy-seven + twelve | |
53. | The Chicken Story: sixty + thirty | |
54. | The Chicken Story: seventy-nine - seventy-three | |
55. | The Chicken Story: fifty + twenty | |
56. | The Chicken Story: thirty-nine + twelve | |
57. | The Chicken Story: thirty-six + fourteen | |
58. | The Chicken Story: forty-one + seventeen | |
59. | The Chicken Story: thirteen + nineteen | |
60. | The Chicken Story: twenty-four + thirty-two |