IXL | Write number sentences for word problems with one addend unknown - up to 20

Read the story.

The Walkers have 2 board games and some card games. They have 11 games in all. How many card games do the Walkers have?

Write a number sentence to match the story. Use the ? for the unknown number.

How many card games do the Walkers have?

card games

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Learn with an example

question

Read the story.

Levi made a painting of trees. He painted 4 trees in light green. He painted some other trees in dark green. He painted 14 trees in all. How many dark green trees did Levi paint?

Write a number sentence to match the story. Use the ? for the unknown number.

How many dark green trees did Levi paint?

dark green trees

solution

Levi made a painting of trees. He painted 4 trees in light green. He painted some other trees in dark green. He painted 14 trees in all. You need to find how many dark green trees Levi painted. It can be helpful to draw a model.

total trees

light green

dark green

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

Or you can use the related subtraction sentence.

–

Levi painted 10 dark green

trees.

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Time
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X.7Word problems with one addend unknown - up to 20

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