🎯 WALT: We Are Learning To evaluate expressions involving subtraction of negative numbers

Success Criteria:

• I can solve expressions like 5 - (-3)
• I can explain why subtracting a negative number increases the value
• I can represent subtraction of negatives on a number line

📝 Remember: Subtracting a negative = Adding a positive!

1. Choose the correct answer for: 8 - (-2)

6

10

-10

-6

2. Which expression equals 12?

9 - (-3)

7 - (-4)

15 - (-3)

All of the above

3. What is -5 - (-8)?

-13

3

-3

13

🔢 Part 2: Solve These Expressions

Guided Steps (Dyslexia-Friendly):
• Step 1: Write the expression
• Step 2: Change subtraction of negative to addition
• Step 3: Calculate the answer
• Step 4: Check using a number line if needed

4. Calculate: 6 - (-4) = _______

5. Calculate: -3 - (-7) = _______

6. Calculate: 0 - (-9) = _______

7. Sarah owes $12 to her friend. Her friend then forgives $5 of the debt. Write an expression and solve to find how much Sarah still owes.

Expression: ________________

Answer: Sarah still owes $______

8. The temperature was -2°C. It then rose by removing a drop of 3°C (meaning it went up 3°C). What is the new temperature?

Expression: ________________

New temperature: ______°C