This video uses an example of tablet screen sizes and compares lengths using a number line. The video compares lengths in centimeters, but we can use the same method to compare lengths in inches.

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question 1

$Glen$ is $165$165 cm tall. $Valentina$ is $144$144 cm tall.

Who is taller?

$Valentina$
A
$Glen$
B

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

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question 2

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

Choose the list that puts the items in order from shortest to longest.
Dolphin, $Whale$ , $Boat$ , $Shark$ , $Ship$
A
$Whale$ , Dolphin, $Ship$ , $Shark$ , $Boat$
B
Dolphin, Shark, Whale, Boat, Ship
C
$Shark$ , Dolphin, $Ship$ , $Whale$ , $Boat$
D

Remember!

When you compare lengths, make sure your values use the same units of measurement. For example, all lengths are in inches.

9.05 Order and compare lengths

Are you ready?

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question 2

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