Here is an equation: x + 4 = 17
Draw a tape diagram to represent the equation. Which part of the diagram shows the quantity x What about 4? What about 17? How does the diagram show that x + 4 has the same value as 17?
Diego is trying to find the value of x in 5*x = 35. He draws this diagram but is not certain how to proceed.

Complete the tape diagram so it represents the equation 5*x = 35.
Diego is trying to find the value of x in 5*x = 35. He draws this diagram but is not certain how to proceed.

Find the value of x.
For each equation, find the unknown value.
x + 9 = 16
For each equation, find the unknown value.
4 * x = 28
Categorize each equation to one of the two tape diagrams.
x + 3 = 9
3 + x = 9
x + x + x = 9
9 = 3 * x
3 * x = 9
x = 9 - 3
x = 9 / 3


A shopper paid $2.52 for 4.5 pounds of potatoes, $7.75 for 2.5 pounds of broccoli, and $2.45 for 2.5 pounds of pears. What is the unit price of the potatoes?
A shopper paid $2.52 for 4.5 pounds of potatoes, $7.75 for 2.5 pounds of broccoli, and $2.45 for 2.5 pounds of pears. What is the unit price of the broccoli?
A shopper paid $2.52 for 4.5 pounds of potatoes, $7.75 for 2.5 pounds of broccoli, and $2.45 for 2.5 pounds of pears. What is the unit price of the pears?
A sports drink bottle contains 16.9 fluid ounces. Andre drank 80% of the bottle. How many fluid ounces did Andre drink?
The daily recommended allowance of calcium for a sixth grader is 1,200 mg. One cup of milk has 25% of the recommended daily allowance of calcium. How many milligrams of calcium are in a cup of milk? If you get stuck, consider using the double number line.