10. Measurement

Lesson

Can you order 2 or 3 digit numbers ?

Order these numbers from largest to smallest.

a

73, \, 33, \, 37

Worked Solution

b

671, \, 167, \, 617

Worked Solution

Idea summary

When we use place value to order numbers, always start with the far left digit and think about the digit's place value.

This video uses an example of tablet screen sizes and compares lengths using a number line.

Glen is 165 cm tall. Valentina is 144 cm tall. Who is taller?

Worked Solution

Idea summary

We can use a number line to compare measurements by plotting the values. The further the number is to the right of 0, the larger the number is.

This video shows how we can compare numbers, if the unit of length are the same, to order by length.

A shark is 6 m long, a boat is 19 m long, a dolphin is 3 m long, a ship is 25 m long and a whale is 14 m long.

Choose the list that puts the items in order from shortest to longest.

A

Dolphin, Shark, Whale, Boat, Ship

B

Whale, Dolphin, Ship, Boat, Shark

Worked Solution

Idea summary

When we compare lengths, make sure the values use the same units of measurement. For example, all lengths are in centimetres.