| Problem | Answer | % Correct |
|---|---|---|
| 37 - 25 = | 12 | 99%
|
| 247 - 193 = | 54 | 99%
|
| 123 - 14 = | 109 | 97%
|
| 292 - 62 = | 230 | 97%
|
| 273 - 229 = | 44 | 97%
|
| 144 - 91 = | 53 | 97%
|
| 158 - 59 = | 99 | 97%
|
| 207 - 54 = | 153 | 96%
|
| 121 - 89 = | 32 | 96%
|
| 180 - 97 = | 83 | 96%
|