# Lesson 12 School Supplies

• Let’s find the difference between quantities.

## Warm-up Notice and Wonder: School Supplies

What do you notice?
What do you wonder?

## Activity 1 Not Enough Pencils

There are 10 students at the table.
There are 6 pencils.
How many students won’t get a pencil?
Show your thinking using drawings, numbers, or words.

## Activity 2 Compare Problems

1. There are 9 markers in a bin.
There are 4 caps for the markers.
How many more caps are needed so that each marker has a cap?
Show your thinking using drawings, numbers, or words.

Equation:

2. There are 2 folders on the teacher’s desk.
There are 9 folders on the supply table.
How many fewer folders are there on the desk than the table?
Show your thinking using drawings, numbers, or words.

Equation:

3. There are 5 dry erase boards at each table.
There are 8 markers at each table.
How many more markers are there than dry erase boards at each table?
Show your thinking using drawings, numbers, or words.

Equation:

## Problem 1

There are 10 dragons in the cave.
There are 3 dragons flying outside.
How many fewer dragons are flying than are in the cave?
Show your thinking with drawings, numbers, or words.