This is a set of 16 task cards that require students to add fractions and decimals to find the perimeter of regular and irregular shapes. Many of the shapes have unlabeled sides and require the students to use problem solving skills to find the missing dimensions. The cards that include fractions are all like denominators, but many involve simplifying or regrouping. The cards that use metric measurements include some that are labeled with decimals.

I designed these cards for use with above-level fifth graders who have already studied both fractions and decimals and required some extra practice as we move into geometry. I have tested these with students and tried to include as distractors the common mistakes kids make, both in calculations and in forgetting to include sides that aren't labeled.

The file is a 6-page PDF file (4 pages of task cards, 4 per page) with a half-page recording sheet and an answer key.