Adding and Subtracting Mixed Numbers

We are working on adding and subtracting mixed numbers in math right now. The kids are doing pretty well, but we're still getting tripped up in a couple of spots. For the homework tonight, I had them do it in class and then I corrected it. I would like them to fix their incorrect answers and return it.

Common Errors

Adding Mixed Numbers - Most students have an easier time adding than subtracting. The mixed numbers sometimes has an answer with a whole number that has a fraction greater than one (improper fraction). They need to rewrite this as a mixed number with a fraction. Example: The answer to an addition problem is 11 5/4. Their final answer should be 12 1/4.

Subtraction Mixed Numbers - This is illustrated above. Most students are regrouping, but some are moving over 10 instead of a whole fraction. In the example above they need to add 4/4ths not 10/4ths. Some students aren't adding the initial fraction to the whole fraction. From above, they need to add 1/4 and 4/4 to equal 5/4 before subtracting.