# Lesson 1 Story Problems and Expressions

Let’s make sense of and solve story problems.

## Warm-up Notice and Wonder: A Library

What do you notice? What do you wonder?

## Activity 1 The Library

Some kids were at the library.

Then some of the kids went home.

What do you notice?

What do you wonder?There were 9 kids at the library.

Then 2 of the kids went home.

How many kids are at the library now?

Show your thinking using drawings, numbers, or words.

## Activity 2 Story Problems About the Library

5 books were on a shelf.

Clare put 2 more books on the shelf.

How many books are on the shelf now?

Show your thinking using drawings, numbers, or words.Expression:

6 books were stacked up on the table.

4 of the books fell on the floor.

How many books are still on the table?

Show your thinking using drawings, numbers, or words.Expression:

6 kids were listening to a story.

4 more kids joined the group.

How many kids are listening to the story now?

Show your thinking using drawings, numbers, or words.Expression:

There were 5 computers turned on.

The librarian turned 2 of the computers off.

How many computers are still on?

Show your thinking using drawings, numbers, or words.Expression: