Step 3
Difficulty 3
1. | Number detectives: 102+98=? | |
2. | Number detectives: 56+92=? | |
3. | Number detectives: 201+99=? | |
4. | Same or Different: Answer 62 | |
5. | Same or Different: Answer 66 | |
6. | Same or Different: Answer 73 | |
7. | Hundreds and hundreds: ?64+5?9=90? | |
8. | Hundreds and hundreds: 364+235=? | |
9. | Make 1000: 500+300+? | |
10. | Make 1000: 600+300+? | |
11. | Make 1000: 400+100+? | |
12. | Make 1000: 400+200+? | |
13. | Make 1000: 200+100+? | |
14. | Make 1000: 250+300+* | |
15. | Make 1000: 750+50+* | |
16. | Number detectives: 30+?, 20+?, 10+?=100 | |
17. | Number detectives: 82+?, 24+?, 76+?=100 | |
18. | Number detectives: 89+?, 21+?, 59+?=100 | |
19. | Addition chains 10 multiples | |
20. | Addition chains 10 multiples | |
21. | Addition chains 10 multiples | |
22. | Anyone for a burger?:$4+$5+$2+$2+$2 | |
23. | Anyone for a burger?:$4+$6+$1+$3 | |
24. | Bargain basement: $16+$4+$50 | |
25. | Add it up: Addition with regrouping 314+428 | |
26. | Add it up: Addition with regrouping 628+347 | |
27. | Add it up: Addition with regrouping 249+344 | |
28. | Add it up: Addition with regrouping 638+143 | |
29. | Add it up: Addition with regrouping 773+219 | |
30. | Add it up: Addition with regrouping 315+27 | |
31. | Add it up: Addition with regrouping 259+28 | |
32. | Add it up: Addition with regrouping 437+44 | |
33. | Add it up: Addition with regrouping 673+19 | |
34. | Add it up: Addition with regrouping 536+38 | |
35. | Hundreds and hundreds: 597+600=? | |
36. | Hundreds and hundreds: 643+600=? | |
37. | Hundreds and hundreds: 756+800=? | |
38. | Helen at the sweet shop: 40c+25c+30c+50c | |
39. | True or False?: 12+8=17+4 | |
40. | True or False?: 63+8=65+6 | |
41. | True or False?: 11+8=13+7 | |
42. | True or False?: 26+7=29+4 | |
43. | True or False?: 37+8=39+7 | |
44. | Add it up: 583+228 | |
45. | Add it up: 509+199 | |
46. | Add it up: 341+189 | |
47. | Add it up: 1288+252 | |
48. | Add it up: 2273+339 | |
49. | Add it up: 6082+889 | |
50. | Add Board: Complete vertical algorithm | |
51. | Take tens: 527-?=497 | |
52. | Take tens: 849-?=759 | |
53. | Take tens: 321-?=251 | |
54. | Take tens: 513-?=463 | |
55. | Take tens: 655-?=595 | |
56. | Mysteries of 100!: 100-?=77, 100-?=60, 100-?=88 | |
57. | Mysteries of 100!: 100-?=45, 100-?=28, 100-?=66 | |
58. | Mysteries of 100!: 100-?=40, 100-?=75, 100-?=62 | |
59. | Mysteries of 100!: 100-?=19, 100-?=80, 100-?=69 | |
60. | Mysteries of 100!: 100-?=76, 100-?=65, 100-?=54 | |
61. | Anyone for a burger?: $20-($5+$4+$1+$2) | |
62. | Anyone for a burger?: $20-($6+$5+$1+$3) | |
63. | Anyone for a burger?: $50-($6+$6+$1+$4+$3+$3) | |
64. | 100 zone: 600-3, 400-5, 200-7 | |
65. | 100 zone: 900-9, 700-7, 500-5 | |
66. | 100 zone: 700-2, 300-4, 100-6 | |
67. | 100 zone: 400-6, 300-4, 200-2 | |
68. | 100 zone: 800-8, 600-6, 400-4 | |
69. | Take it away: Subtraction with decomposition 791-338 | |
70. | Take it away: Subtraction with decomposition 874-258 | |
71. | Take it away: Subtraction with decomposition 362-139=? | |
72. | Take it away: Subtraction with decomposition 984-427=? | |
73. | Take it away: Subtraction with decomposition 653-137=? |