So in the first round, 23 are correct, and there are 29 in total, meaning that he spelled 6 wrong. In the second round, 5 are incorrect, but there are 41 in total, meaning that he spelled 36 words correctly. In the last round, he spelled 29 correctly and 4 incorrectly, meaning that in total, it was 33 words. The words that he spelled correctly, we would have to add.
23 + 36 + 29 = 88 correct words added.
Hope this helped!
Nate