# Ordering Objects by Length

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Ordering Objects by Length
CCSS.MATH.CONTENT.1.MD.A.1

## Ordering Objects by Length

When finding the length of an object, ask yourself 'how long is it?'. Finding the length of an object can help with sorting objects by length such as sorting objects from shortest to longest and sorting objects from longest to shortest. In this text you will find everything you need to know about comparing length and sorting objects by length.

## Comparing Lengths

If we need to order objects by length, first we need to compare the length of each object. Take a look at the pencils below. Each end of the pencil is lined up. Why is it important to line up one end when ordering objects by length? If the ends are all lined up, it makes it easy to compare and see with our eyes the different lengths of each one.

## Ordering Objects by Length – Example

If we want to order the pencils from shortest to longest, start by asking ’which object is the shortest?. Since the ends are lined up, we can see that the blue pencil is the shortest so it is first. Next, the green pencil is longer than the blue pencil, but not as long as the red pencil so the green pencil is next. The red pencil is last, because it is the longest.

## Ordering Objects by Length – Summary

If we want to order and compare objects by length, first find the length. When finding the length of an object, ask yourself 'how long is it?'. Finding the length of an object can help with sorting objects by length such as sorting objects from shortest to longest and sorting objects from longest to shortest.

We can order objects from longest to shortest and shortest to longest.

Have you practiced yet? On this website you can order objects by length and use other activities and exercises to practice.

## Frequently Asked Questions regarding Ordering Objects by Length

What is Length?
How do you Compare Lengths?
How do you Order Objects by Length?

## Ordering Objects by Length exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Ordering Objects by Length.
• ### Which set of ingredients is in the correct order?

Hints

Compare the item to the one below it, is it longer or shorter? If it is shorter, they can't be ordered correctly from shortest to longest.

Here we can see a correctly ordered set of crayons and an incorrectly ordered set.

Solution

Here we can see the correct order of ingredients.

• The paperclip is the shortest so goes first.
• The daffodil is longer than the paperclip but shorter than the straw so goes second.
• The straw is the longest so goes third.
• ### Can you order the ingredients?

Hints

Remember:

• 1 goes next to the shortest item.
• 2 goes next to the middle item.
• 3 goes next to the longest item.

If we were ordering these crayons we would:

• put 1 next to the yellow crayon because it is the shortest.
• put 2 next to the green crayon because it is longer than the yellow crayon but shorter than the blue crayon.
• put 3 next to the blue crayon because it is the longest.

Solution
• 1 goes next to the lipstick because it is the shortest.
• 2 goes next to the stick because it is longer than the lipstick but shorter than the paintbrush.
• 3 goes next to the paintbrush because it is the longest.
• ### Can you compare the lengths of the items to the feather?

Hints

Remember, you are comparing each item to the magic peacock feather.

For example, we would highlight the liquorice in violet because it is shorter than the feather.

Solution

The items that should be highlighted in violet because they are shorter than the feather:

• lollipop stick
• sharpener
• hair clip
• base 10 rod
The items that should be highlighted in blue because they are longer than the feather:
• pencil
• toothbrush
• spoon

• ### Can you sort these objects by length?

Hints

Use the picture at the top to see each item next to each other.

Which item is the shortest? This one needs to come first.

Solution

Here is the correct order.

• ### Which item is the longest?

Hints

Choose an item and compare it to the other ones, is it longer or shorter?

Can you find the shortest item? This is definitely not the one we are looking for.

Solution

The ribbon is the longest item so will need to go in first.

• ### Tall and short.

Hints

Look at the flowers this way to help you see the tallest/longest and the shortest.

Once you have found the shortest and tallest, compare the flowers that are left to help you to order them.

Solution
1. The tallest flower is number 4.
2. The shortest flower is number 3.
3. From shortest to tallest, the correct order is 3, 2, 1, 4.