| Problem | Answer | % Correct |
|---|---|---|
| 99/11 | 9 | 95%
|
| 45-8 | 37 | 94%
|
| 100+44 | 144 | 88%
|
| 23+75 | 98 | 88%
|
| 40x5 | 200 | 87%
|
| 67x2 | 134 | 86%
|
| 95/5 | 19 | 79%
|
| 77-29 | 48 | 62%
|
| 56+74 | 130 | 58%
|
| 450/3 | 150 | 52%
|
| 153/9 | 17 | 50%
|
| 250+360 | 610 | 46%
|
| 23x8 | 184 | 39%
|
| 1,000-752 | 248 | 36%
|
| 89x9 | 801 | 23%
|