# Write Expressions Where Letters Stand for Numbers

Warmup

Activity #1

 Complete a Table of Relationship.

• Use the Text tool or pen tool to enter your values.

Elena is 59 inches tall. Some other people are taller than Elena. Complete the table to show the height of each person.

Lin set up a lemonade stand. She sells the lemonade for \$0.50 per cup. Complete the table to show how much money she would collect if she sold each number of cups.

• Use the Text tool or pen tool to enter your values.

Activity #2

 Create Mathematical Expressions.

In this activity, you are required to use the tiles to create a mathematical expression that will yield the goal at the bottom left of the applet. Note that is an operation that stands for multiplication. The first goal, 37 has been set for you. You can use the slider to change the goal at any time.

• Drag number tiles in the boxes to try to create an expression equal to this value.
• Then use the PEN or TEXT tools to show how your setup is correct.
• Click the reset button, and choose a different goal.
• Keep practicing as much as you can.

Activity #3

 Create Mathematical Expressions.

In this activity, you are required to use the tiles to create a mathematical expression that will yield the goal at the bottom left of the applet. The first goal, 16 has been set for you. You can use the slider to change the goal at any time.

• Drag number tiles in the boxes to try to create an expression equal to this value.
• Then use the PEN or TEXT tools to show how your setup is correct.
• Click the reset button, and choose a different goal.
• Keep practicing as much as you can.

Challenge #1

Write an equation represented by this tape diagram using each of these operations.

(2.) Subtraction

(3.) Multiplication

(4.) Division

Challenge #2

Han’s house is 450 meters from school. Lin’s house is 135 meters closer to school. How far is Lin’s house from school?

Challenge #3

Tyler’s playlist has 36 songs. Noah’s playlist has one quarter as many songs as Tyler’s playlist. How many songs are on Noah’s playlist?

Quiz Time