Florida B.E.S.T. MA.6.GR.2.3
The Standard
Solve mathematical and real-world problems involving the volume of right rectangular prisms with positive rational number edge lengths using a visual model and a formula.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students use drawings, layers, or partitioned prisms to represent volume when edge lengths include fractions or decimals. They multiply the three edge lengths and report the result in cubic units.
What Mastery Looks Like
- Students draw or interpret a prism model with fractional or decimal edge lengths. They use length × width × height accurately and label the result in cubic units. They can explain what the answer means in context.
Common Misconceptions
- Students may add the three edge lengths instead of multiplying them. They may confuse volume with surface area or label answers with square units. Fraction and decimal multiplication errors are also common.
How to Assess It
- Exit ticket: A prism measures 2.5 cm by 1.2 cm by 4 cm. Draw a labeled model, write a formula, and find its volume.
Lesson moves
Ways to Teach It
Build a 3 by 2 by 1.5 centimeter paper prism from a grid-paper net, then label its dimensions and calculate its volume.
Show two prism models with equal volume and ask students to explain how different edge lengths can produce the same volume.
Create matching cards with prism diagrams, rational edge lengths, volume expressions, and answers for students to sort into sets.
Measure a cereal box to the nearest tenth of a centimeter, then estimate and calculate how much space it holds.
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Related Standards
- MA.5.GR.3
Solve problems involving the volume of right rectangular prisms.
- MA.5.GR.3.2
Find the volume of a right rectangular prism with whole-number side lengths using a visual model and a formula.
- MA.3.GR.2.3
Solve mathematical and real-world problems involving the perimeter and area of rectangles with whole-number side lengths using a visual model and a formula.
- MA.5.GR.3.3
Solve real-world problems involving the volume of right rectangular prisms, including problems with an unknown edge length, with whole-number edge lengths using...
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