What is the Area Inside Worksheet
This what is the area inside worksheet lets 3rd grade students split grid shapes into two rectangles, add the parts, and find the total area. An answer key is included for quick checking.
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About this resource
Description
The What is the Area Inside Worksheet helps 3rd grade students find the area of shapes that are made of two rectangles. Area is the number of square units that cover the inside of a shape. When a shape is not a simple rectangle, students can break it into smaller rectangles, count the squares in each part, and add the parts together. This strategy builds a strong bridge from counting squares to using addition and multiplication to measure area.
This what is the area inside worksheet gives students six grid shapes to explore. In Part A, each shape is already shaded into a dark rectangle and a light rectangle, so students count each part, write an addition sentence, and record the total area in square units. In Part B, students draw their own line to split each shape into two rectangles before finding the area. Use it as guided practice, a math center, homework, or a quick check after a lesson on area.
What’s Included
- One 3rd grade area worksheet with six grid shapes
- Part A: four shaded shapes with dark + light = area number sentences
- Part B: two shapes students split into rectangles on their own
- A complete answer key
Why This Worksheet Helps Kids
First, it connects area to addition, which shows students that the area of a whole shape equals the sum of its parts. Second, it moves students from a shaded model to independent decomposing, so they build real problem-solving skills. Third, the clear unit-square grids let every child check their thinking by counting.
Ideas for Teachers and Parents
Have students color the two rectangles in Part B with two different colors before they count. Ask them to find a second way to split the same shape and compare the totals. For extra practice, draw L-shaped rooms on grid paper and challenge your child to find each area. This 3rd grade area worksheet also pairs well with lessons on multiplying rows and columns.
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