Volume of Composite Figures
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Volume of Composite Figures
Volume of composite figures worksheet: six solids made of two rectangular prisms side by side. Find each prism’s volume and add them. Grade 5 math with an answer key.
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- Skill
- Volume Worksheets
- Pages
- 1
- Last updated
- Time
- About 15 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Find the volume of a rectangular prism by counting unit cubes, then as layers of the base, then with V = l × w × h, and add the volumes of two prisms joined together.
Reviewed by Mrs. Catherine Reynolds, Teacher. How we check worksheets
How to use this sheet
- For counting cubes, have the child find the number in one layer and multiply by the number of layers.
- Have the child write the units each time: cubic units for volume, square units for surface area.
- For surface area, have the child list each face and its area, and check that they have counted every face.
Common mistakes
- Counting only the cubes that can be seen and missing the hidden ones.
- Mixing up surface area and volume. Surface area is the wrapping paper; volume is what fills the box.
- Forgetting the 1/3 in the volume of a cone or a pyramid.
- Writing square units for a volume. Volume is counted in cubes, so its units are cubic, such as cm³.
