Step 2
Difficulty 2
| 1. | Changing numbers: Addition/subtraction using negative integers | |
| 2. | Changing numbers: Addition/subtraction using negative integers | |
| 3. | Changing numbers: Addition/subtraction using negative integers | |
| 4. | Changing numbers: Addition/subtraction using negative integers | |
| 5. | Make 20 13+-6+* | |
| 6. | Make 15 3+19+* | |
| 7. | Make 10 8+7+* | |
| 8. | Make 20 8+-2+* | |
| 9. | Make 15 21+-6+* | |
| 10. | T/F double sided eqn incl -ive # | |
| 11. | T/F double sided eqn incl -ive # | |
| 12. | Add these three numbers: 13+-7+3 | |
| 13. | Add these three numbers: 9+2+-3 | |
| 14. | Add these three numbers: 9+8+-5 | |
| 15. | Add these three numbers: 16+-9+2 | |
| 16. | Add these three numbers: 20+-9+11 | |
| 17. | Number detectives: Add 4 clustered hundreds numbers | |
| 18. | Number detectives: Add 4 clustered hundreds numbers | |
| 19. | Number detectives: Add 4 clustered hundreds numbers | |
| 20. | Number detectives: Add 4 clustered hundreds numbers | |
| 21. | Number detectives: Add 4 clustered hundreds numbers | |
| 22. | Adding the big ones: Write missing numbers in vertical addition | |
| 23. | Adding the big ones: Write missing numbers in vertical addition | |
| 24. | Adding the big ones: Write missing numbers in vertical addition | |
| 25. | In the swim: Addition of times | |
| 26. | And a Partridge in a pear tree 12+11+10+9, etc | |
| 27. | Taking the Big Ones: Write the missing numbers in vertical subtraction algorithms | |
| 28. | Taking the Big Ones: Write the missing numbers in vertical subtraction algorithms | |
| 29. | Taking the Big Ones: Write the missing numbers in vertical subtraction algorithms | |
| 30. | True or false 60 - 120 = -60 | |
| 31. | True or false 420 - (-85) =515 | |
| 32. | True or false 120 - 250 = -130 | |
| 33. | Same or different: Click all the boxes with the same answer | |
| 34. | Same or different: Click all the boxes with the same answer | |
| 35. | Same or different: Click all the boxes with the same answer | |
| 36. | Same or different: Click all the boxes with the same answer | |
| 37. | Give or take a thousand: 257908 - 160000 | |
| 38. | Give or take a thousand: 135001 - 34000 | |
| 39. | Give or take a thousand: 106095 - 29000 | |
| 40. | Give or take a thousand: 236401 - 195401 | |
| 41. | Give or take a thousand: 182356 - 127356 | |
| 42. | Give or take a thousand: 262141 - 245141 | |
| 43. | Give or take a thousand: 120068 - 88068 | |
| 44. | Give or take a thousand: 86215 - 7000 | |
| 45. | Give or take a thousand: 13553 - 8000 | |
| 46. | Give or take a thousand: 842908 - 74000 | |
| 47. | Taking the Big Ones: Write the missing numbers in vertical subtraction algorithms | |
| 48. | Taking the Big Ones: Write the missing numbers in vertical subtraction algorithms | |
| 49. | Spot the difference: 4550 - 2150 | |
| 50. | Spot the difference: 6600 - 3650 | |
| 51. | Spot the difference: 5750 - 2550 | |
| 52. | Spot the difference: 9350 - 5450 | |
| 53. | Spot the difference: 2600 - 8700 | |
| 54. | Spot the difference: 8400 - 3500 | |
| 55. | Spot the difference: 3150 - 1500 | |
| 56. | Negatively speaking: -2 +(-4) - * = 10 | |
| 57. | Negatively speaking: - 4 + 5 - * = 10 | |
| 58. | Negatively speaking: -8 +7 - * = 10 | |
| 59. | Negatively speaking: -6 - 1 - * = 10 | |
| 60. | Negatively speaking: -16 +25 - * = 10 |