8. Measurement

Lesson

Remembering how to order numbers can help us in this lesson. Let's try this problem to practice.

Order these numbers from smallest to largest.

516, \, 156, \, 561

Worked Solution

Idea summary

We can put numbers in order using a place value table and comparing the digits from the highest place value.

Let's see how we can use unit cubes to compare the volumes of different 3D shapes.

We want to compare the volumes of the following block stacks.

Which block stack has the smaller volume?

A

B

Worked Solution

Idea summary

Volume means how much space our shape takes up. We can compare volumes by comparing the number of blocks of space the objects take up.

In this video, we see how we can compare the numbers, to work out the largest volume, as long as our shapes are using the same unit of measurement.

Select the correct symbol to compare the following two numbers:

95 \text{cm}^3 ⬚ 98 \text{cm}^3

A

\lt

B

\gt

Worked Solution

Idea summary

If we have shapes with the same unit of measurement, we can compare the numbers, to work out the largest volume.

Compare objects using familiar metric units of area and volume