Subtracting fractions with common denominators

The first instance of  is under the 4th Grade Math Mission. This exercise practices subtracting fractions in which the denominators are already common.

Types of Problems
There is one type of problem in this exercise:


 * 1) Subtract the numbers: This problem has two fractions that are supposed to be subtracted together. The student finds the correct answer and enters it in the provided box.SubCD.png

Strategies
This exercise is easy to get accuracy badges because the numbers are relatively small and can be done without any aid. The speed badges are also nice and easy.


 * 1) There is no need to reduce fractions on this problem. Since they can be left unreduced, just subtract the numerators and leave the denominator the same. Standard subtracting and no negatives needed.