Variables on Number Lines

Name:

Date:

📚 Part 1: WALT, Success Criteria & Warm-up

WALT: Identify a variable as an unknown number and use a number line to solve one-step equations (e.g., x + 3 = 9).

Success Criteria: I can say what a variable is, write simple equations with x or h, and use jumps on a number line to find the unknown.

1. Warm-up: I have 5 apples and then I have 8 apples. How many did I add?

2. What is a variable?

A letter that stands for a number we do not yet know

A fixed number like 7

A picture

3. Tick all that are examples of a variable (something that can change):

The temperature outside (°C)

The number of students in this class

The number 7 written on a card

4. Find the unknown: x + 4 = 9. Write x = _____

5. Solve and show on a number line: x + 3 = 9. What is x?

Show jumps on the number line below and write your answer.

Answer: x = _____

6. Solve and show on a number line: 6 + x = 11. How many jumps do you make?

Answer: x = _____

7. Solve and explain on a number line: x - 4 = 5. Explain how you found x and write its value.

Answer: x = _____

8. Real-life problem: You have $h and you earn another $3 to have $10 in total. Write an equation and use a number line to find h.

Write the equation: ____________________

Show your number-line jumps and answer below.

Answer: h = _____

9. Exit ticket (write one sentence): What is a variable and how did a number line help you today?