10. 3D Measurement
Lesson
Are you ready?
If we can multiply and divide by powers of 10, that will help us in this lesson. Let's try a problem to practice.
Examples
Example 1
Find the value of 6.41 \times 1000.
Worked Solution
Idea summary
The powers of 10 to remember are: 10, \, 100, \, 1000 and 10\,000.
When we multiply or divide by a power of 10, each digit of our number moves up or down by as many place value positions as there are zeros.
Convert capacity
This video shows some strategies for converting between units of capacity.
Examples
Example 2
Convert 4920 millilitres to litres.
Worked Solution
Idea summary
When you convert from a larger unit to a smaller unit (e.g. \text{L} to \text{mL}), you multiply.
When you convert from a smaller unit to a larger unit (e.g.\text{ mL} to \text{L}), you divide.
