Volume
Counting cubes and volume = length × breadth × height. Read one part at a time and tap “I know this”. Then test yourself in the quiz.
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Volume
Volume is the space inside a 3D object. Count cubes, or use a formula.
Volume of a rectangular prism = length × breadth × height: 4 cm × 3 cm × 2 cm = 24 cm³.
- Volume units are cubic: cm³, m³.
- 1 cm³ holds exactly 1 ml of water.
- Volume of a cube = s × s × s = s³.
Converting volume units
| Unit | Equals |
|---|---|
| 1 cm³ | 1 000 mm³ |
| 1 m³ | 1 000 000 cm³ |
| 1 cm³ | 1 ml |
| 1 m³ | 1 000 ℓ = 1 kℓ |
A box of 4 cm × 3 cm × 2 cm has a volume of 24 cm³, so it holds 24 ml of water.
Remember this and test yourself
- Volume = space inside an object.
- Rectangular prism: l × b × h.
- Units are cubic: cm³.
- 1 cm³ = 1 ml.
- 1 m³ = 1 kℓ = 1 000 ℓ.
Write these points in your book. Read them again the night before the test.
Length, breadth, height: three measures, the 3 in cm³.
Important words
First say the answer yourself, then turn the card over.
Match column A to column B
Tap a word in column A, then its meaning in column B. You can also start in column B.
True or false?
Read the question and the answer. Is the answer right? Tap True or False.
Now the real quiz!
The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.
Take the quiz: Volume- Let your child work the examples on paper and explain them to you.
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Follows CAPS for Grade 7 Mathematics. Always check your teacher’s notes and textbook too.