| Addition | Answer | % Correct |
|---|---|---|
| 999+1 | 1 000 | 88%
|
| 85+15 | 100 | 84%
|
| 0+1 | 1 | 83%
|
| 1+1+1+1 | 4 | 83%
|
| 5+495 | 500 | 83%
|
| 500 000+500 000 | 1 000 000 | 82%
|
| 56+45 | 101 | 79%
|
| 1 050+6 900 | 7 950 | 75%
|
| 45+155 | 200 | 74%
|
| 89+31 | 120 | 70%
|
| 999 999 999+1 | 1 000 000 000 | 69%
|
| 78+26 | 104 | 69%
|
| 25+25 | 50 | 68%
|
| 566+134 | 700 | 68%
|
| 32+68 | 100 | 67%
|
| 50 601+10 399 | 61 000 | 38%
|