# ACT Math : How to add odd numbers

## Example Questions

### Example Question #1 : Even / Odd Numbers

Solve:

Explanation:

Since there is no tens digit to carry over, proceed to add the tens digits:

### Example Question #2 : Even / Odd Numbers

At a certain high school, everyone must take either Latin or Greek. There are  more students taking Latin than there are students taking Greek. If there are  students taking Greek, how many total students are there?

Explanation:

If there are  students taking Greek, then there are  or  students taking Latin. However, the question asks how many total students there are in the school, so you must add these two values together to get:

or  total students.

### Example Question #3 : Even / Odd Numbers

Find the sum of 13 and 19.

Explanation:

Rewrite the question in a mathematical expression.

Since this number is larger than , carry over the  in tens digit when adding the next term.

Add the tens digit with the carry over.

Combine the tens digit and the ones digit. The answer is .