Free Grade 3 Working with Introducing Nets Common Errors Lessons
Free Grade 3 lessons for Working with Introducing Nets Common Errors: 12 real questions with a full answer key and worked solutions. Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
Free
Core
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with introducing nets common errors
Explain working with introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing nets common errors
Calculate working with introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing nets common errors
Compare working with introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing nets common errors
Justify working with introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Working with Introducing Nets Common Errors works
Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Find the volume of a cuboid 2 cm × 8 cm × 5 cm.[1]
- 2.Find the volume of a cuboid 9 cm × 3 cm × 5 cm.[1]
- 3.Find the volume of a cuboid 10 cm × 10 cm × 2 cm.[1]
- 4.Find the volume of a cuboid 4 cm × 4 cm × 3 cm.[1]
- 5.Find the volume of a cuboid 8 cm × 10 cm × 7 cm.[2]
- 6.Find the volume of a cuboid 5 cm × 6 cm × 9 cm.[2]
- 7.Find the volume of a cuboid 6 cm × 9 cm × 4 cm.[2]
- 8.Find the volume of a cuboid 10 cm × 6 cm × 8 cm.[2]
- 9.Find the surface area of a cuboid 3 cm × 4 cm × 5 cm.[3]
- 10.Find the surface area of a cuboid 10 cm × 2 cm × 5 cm.[3]
- 11.Find the surface area of a cuboid 6 cm × 2 cm × 6 cm.[3]
- 12.Find the surface area of a cuboid 8 cm × 6 cm × 5 cm.[3]
Show answers and working
1. 80 cm³
Volume = length × width × height. 2 × 8 × 5 = 80 cm³.
2. 135 cm³
Volume = length × width × height. 9 × 3 × 5 = 135 cm³.
3. 200 cm³
Volume = length × width × height. 10 × 10 × 2 = 200 cm³.
4. 48 cm³
Volume = length × width × height. 4 × 4 × 3 = 48 cm³.
5. 560 cm³
Volume = length × width × height. 8 × 10 × 7 = 560 cm³.
6. 270 cm³
Volume = length × width × height. 5 × 6 × 9 = 270 cm³.
7. 216 cm³
Volume = length × width × height. 6 × 9 × 4 = 216 cm³.
8. 480 cm³
Volume = length × width × height. 10 × 6 × 8 = 480 cm³.
9. 94 cm²
Three pairs of faces: 12, 20, 15. 2 × (12 + 20 + 15) = 94 cm².
10. 160 cm²
Three pairs of faces: 20, 10, 50. 2 × (20 + 10 + 50) = 160 cm².
11. 120 cm²
Three pairs of faces: 12, 12, 36. 2 × (12 + 12 + 36) = 120 cm².
12. 236 cm²
Three pairs of faces: 48, 30, 40. 2 × (48 + 30 + 40) = 236 cm².
Worked examples
Find the volume of a cuboid 4 cm × 3 cm × 9 cm.
- Volume = length × width × height.
- 4 × 3 × 9 = 108 cm³.
- Answer: 108 cm³
Find the volume of a cuboid 6 cm × 5 cm × 8 cm.
- Volume = length × width × height.
- 6 × 5 × 8 = 240 cm³.
- Answer: 240 cm³
Find the surface area of a cuboid 10 cm × 10 cm × 3 cm.
- Three pairs of faces: 100, 30, 30.
- 2 × (100 + 30 + 30) = 320 cm².
- Answer: 320 cm²
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Adds the dimensions instead of multiplying.
Correction: Volume = l × w × h.
Counts only three faces for surface area.
Correction: A cuboid has six faces — three matching pairs.
Teacher tips
- · Build cuboids from cubes before using the formula.
Parent tips
- · Work out how many sugar cubes fit in a box.
Real-life applications
- · Filling a fish tank, wrapping a present.
Assessment objectives
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Frequently asked
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- What should a learner already know before this?
- Start with Rules and Methods in Introducing Nets Common Errors, Key Vocabulary of Introducing Nets Common Errors, Introducing Nets Word Problems. Each one has its own free lesson, worksheet and quiz.
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- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Working with Introducing Nets Common Errors?
- Move on to Introducing Nets Common Errors in Examinations, Introducing Nets Essentials, Introducing Nets Techniques, Introducing Nets Word Problems, which build directly on this idea.
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