The model below can be used to find the sum of two mixed numbers. What is the sum? What is the difference? Show your work. Two sets of mixed number models.--LONG DESCRIPTION--The first model: Two fraction strips are shown. The top is red and contains the label "1". Below is a purple fraction strip, divided into 8 parts, stretching a portion of the length of the strip above. Each part contains the label "one-tenth". The second set: Three fraction strips are shown. The top 2 are red and contain the label "1". Below is a green fraction strip, divided into 3 parts, stretching a portion of the length of the strip above. Each part contains the label "one-fifth".