| Problem | Answer | % Correct |
|---|---|---|
| 90 - 80 = | 10 | 100%
|
| 333 - 222 = | 111 | 99%
|
| 357 - 223 = | 134 | 99%
|
| 98 - 20 = | 78 | 99%
|
| 35 - 26 = | 9 | 99%
|
| 258 - 43 = | 215 | 98%
|
| 102 - 44 = | 58 | 98%
|
| 117 - 42 = | 75 | 98%
|
| 201 - 79 = | 122 | 97%
|
| 322 - 154 = | 168 | 97%
|