3. Mrs. Bern purposefully made a mistake when solving a problem in front of the class. Which statement below identifies her mistake?
3
23 +13
2
10
4
= 3
10 10
A. Mrs. Bern did not add the denominators correctly.
B. Mrs. Bern did not find a common denominator.
C. Mrs. Bern did not find the correct equivalent fractions.
D. Mrs. Bern did not add the whole numbers correctly.