8. Measurement

Lesson

We need to remember how to order numbers to help us in this lesson. Let's try this problem to practice.

Order these numbers from largest to smallest.

a

73,\, 33, \, 37

Worked Solution

b

671,\, 167, \, 617

Worked Solution

Idea summary

Summary of the idea

We could weigh each object in a group to put them in order but we could also use balance scales. We can work out which object is heavier or lighter out of two objects, then compare it to another object.

In the video, we'll use the mass to compare objects, as well as balance scales.

We want to order these animals from heaviest to lightest.

\quad \quad\quad\quad\quad\quad\quad\quadCockatoo \quad \quad\quad\quad\quad\quad\quad\quad Sparrow \quad\quad \quad\quad\quad\quad\quad\quad\quad Pigeon

a

Which of these animals is the heaviest?

A

Sparrow

B

Cockatoo

C

Pigeon

Worked Solution

b

Which of these animals is the second heaviest?

A

Sparrow

B

Cockatoo

C

Pigeon

Worked Solution

c

Which of these animals is the lightest?

A

Sparrow

B

Pigeon

C

Cockatoo

Worked Solution

Idea summary

To put objects in order by mass, we need to make sure we are using the same unit of measurement, such as grams, for each object we are comparing.