What is 1 more than this number? 99.
What is one more than this number? 99.
We could use a hundred square to help us answer this question. First, we need to find number 99 on the hundred square. To find one more than a number on the number line, we look to the number on the right. So one more than 99 is 100.
The answer is 100 because 100 is one more than 99.