Mini-Quiz: Adding Fractions

1. What happens if the numerators are the same but the denominators are different?

   You can add the two fractions by adding the denominators.Good try, but not right. Select another answer. That never can happenSorry, not correct. Try another button. You cannot add the fractions in that formThat is correct. You know your fractions.

2. Why it is called cross multiplying?

   You cross out equal termsSorry, not correct. Try another button. You multiply across the two fractions, numerator times denominatorCorrect. You are doing great. It relates to when you multiply two fractions together to get a productOops! Wrong answer. Re-read the question and try again.

3. What is the lowest common denominator when you add 2/13 + 5/39?

   39That is correct. You know your fractions. 26Good try, but not right. Select another answer. 13Oops! Wrong answer. Re-read the question and try again.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.