IXL | Word problems with one addend unknown - up to 20

Read the story.

Rick saw 1 yellow fire truck in a parade. He saw some red fire trucks, too. In all, Rick saw 10 fire trucks. How many red fire trucks did he see?

Pick the model that matches the story.

How many red fire trucks did Rick see?

red fire trucks

ref_doc_title.

Learn with an example

Read the story.

There are 13 baby chicks in a crate. Most of the chicks are awake, but 3 chicks are asleep. How many chicks are awake?

Pick the model that matches the story.

How many chicks are awake?

chicks

There are 13 baby chicks in a crate. Most of the chicks are awake, but 3 chicks are asleep. This model matches the story.

chicks in all

awake

asleep

Now, find the missing number. The model shows you can use addition or subtraction.

You can write an addition sentence and find the missing number.

Or you can use the related subtraction sentence.

–

So, 10 chicks are awake.

Looking for more? Try this:

$Confetti$

Now entering the Challenge Zone—are you ready?

hr	min	sec
00	00	06

Teacher tools

Work it out

Not feeling ready yet? These can help: