🎯 WALT: Use column subtraction methods for larger numbers involving regrouping

Success Criteria:

✓ I can explain the steps in column subtraction

✓ I can use regrouping when needed

✓ I can subtract accurately using the column method

📚 Part 1: Guided Practice with Steps

1. Complete this subtraction problem. Follow the steps below:

4,235 - 1,478 = _______

Step 1: First I looked at the _______ column.

Step 2: I needed to regroup because _____________

Step 3: After regrouping, I subtracted _____________

Step 4: My final answer is _____________

2. Solve: 3,042 - 1,567 = _______

3. Which column needs regrouping first?
5,204 - 2,738

Ones column

Tens column

Hundreds column

Thousands column

✏️ Part 2: Independent Practice

4. Solve these subtraction problems using the column method:

a) 6,421 - 2,856 = _______

b) 8,003 - 4,267 = _______

5. Word Problem: A school has 4,235 books in their library. They donate 1,478 books to another school. How many books are left?

Number sentence: _________________________

Answer: _______ books are left.

6. Check your answer by estimating. Round both numbers to the nearest thousand:
4,235 rounds to _______ and 1,478 rounds to _______
Estimated answer: _______

🌟 Extension Activities

7. Challenge: Subtract with decimals: 45.67 - 18.89 = _______

8. Multi-step Problem: Sarah had $4,500 in her savings account. She bought a laptop for $1,250 and a phone for $899. How much money does she have left?

9. Reflection: Explain in your own words when you need to regroup in subtraction: