Step 4
Difficulty 4
| 1. | Number detectives: 348+103=? | |
| 2. | Number detectives: 156+104=? | |
| 3. | Same or Different: Answer 58 | |
| 4. | Same or Different: Answer 44 | |
| 5. | Hundreds and hundreds: 657+173=830 | |
| 6. | Hundreds and hundreds: 6?8+157=?2? | |
| 7. | Make 1000: 850+150+* | |
| 8. | Make 1000: 600+150+* | |
| 9. | Make 1000: 50+800+* | |
| 10. | Addition chains 10 multiples | |
| 11. | Addition chains 10 multiples | |
| 12. | 100 zone: 295+8=?, 798+?=804, ?+9=405 | |
| 13. | 100 zone: 294+8=?, 396+?=401, ?+4=705 | |
| 14. | 100 zone: 295+9=?, 596+?=602, ?+8=201 | |
| 15. | 100 zone: 399+5=?, 895+7=902, ?+6=503 | |
| 16. | 100 zone: 698+6=704, 292+?=301, ?+8=503 | |
| 17. | Comp. pairs add/subtract: 678+156=834 | |
| 18. | Comp. pairs add/subtract: 246+357=603 | |
| 19. | Comp. pairs add/subtract: 545+328=873 | |
| 20. | Comp. pairs add/subtract: 488+323=811 | |
| 21. | Comp. pairs add/subtract: 493+257=750 | |
| 22. | Hundreds and hundreds: Complete vertical hundreds addition | |
| 23. | Hundreds and hundreds: Complete vertical hundreds addition | |
| 24. | 100 zone: *+95=500 365+*=400 625+75=* | |
| 25. | 100 zone: *+185=200 655+*=700 335+65=* | |
| 26. | 100 zone: *+25=300 445+*=500 895+5=* | |
| 27. | 100 zone: *+45=400 165+*=200 725+75=* | |
| 28. | 100 zone: *+85=700 405+*=500 375+25=* | |
| 29. | Bessie's found her marbles: 327 - (158+57+63+90) | |
| 30. | CD players $285 - $128 | |
| 31. | Same or Different: Answer 42 | |
| 32. | Same or Different: Answer 50 | |
| 33. | Same or Different: Answer 85 | |
| 34. | Same or Different: Answer 76 | |
| 35. | Same or Different: Answer 24 | |
| 36. | Same or Different: Answer 60 | |
| 37. | Same or Different: Answer 32 | |
| 38. | Same or Different: Answer 45 | |
| 39. | Same or Different: Answer 21 | |
| 40. | Same or Different: Answer 55 | |
| 41. | Hundreds Takeaway: *00 - 37 = 66* | |
| 42. | Hundreds Takeaway: *00 - *8 = 352 | |
| 43. | Hundreds Takeaway: 800 - **5 = 45 | |
| 44. | Hundreds Takeaway: *00 - 569 = *1 | |
| 45. | Take tens: 734-50=? | |
| 46. | Take tens: 408-90=? | |
| 47. | Take tens: 978-80=? | |
| 48. | Take tens: 345-70=? | |
| 49. | Take tens: 533-60=? | |
| 50. | Subtraction chains: 87-14-13-15, 98-17-11-6 | |
| 51. | Subtraction chains: 79-14-15-12, 68-17-20-11 | |
| 52. | Subtraction chains: 76-13-12-11, 92-20-12-14 | |
| 53. | Subtraction chains: 94-20-14-11, 65-15-25-15 | |
| 54. | Bargain basement: $50-(3x$8+2x$2+$10) | |
| 55. | Bargain basement: $50-(1x$10+3x$2+$10) | |
| 56. | Laura at sweet shop: $5-($1+25c+5x10c) | |
| 57. | Carla at sweet shop: $5-(2x10c+20c+4x10c) | |
| 58. | 1000s crossing: 6002-6, 4001-4, 2005-7 | |
| 59. | 1000s crossing: 7002-8, 5004-7, 3003-6, | |
| 60. | 1000s crossing: 9002-9, 18006-7, 7007-9 | |
| 61. | 1000s crossing: 5001-5, 10003-5, 1004-5 | |
| 62. | 1000s crossing: 8004-7, 13003-8, 4006-9 | |
| 63. | Tens Takeaway: 400-20, 40 less than 480, ?-80=360 | |
| 64. | Tens Takeaway: 500-50, 70 less than 700, ?-90=810 | |
| 65. | Tens Takeaway: 900-30, 10 less than 400, ?-60=40 | |
| 66. | Tens Takeaway: 300-80, 50 less than 700, ?-90=110 | |
| 67. | Tens Takeaway: 600-20, 70 less than 500, ?-30=370 | |
| 68. | Hundreds and Thousands: 1643 - 788 = *55 | |
| 69. | Sarah at the shop: $2 - (40c + 30c + 50c + 5c) | |
| 70. | Tina at the shop: $2 - (60c + 45c + 25c + 30c) |