Mental Math Strategies Practice

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Date:

Calculator and math symbols illustration

🧠 WALT: We Are Learning To use mental math strategies

Success Criteria: I can use levelling, bridging, and constant difference strategies to solve problems mentally

1. Use the levelling strategy to solve: 47 + 29

Round one number to make it easier: 47 + 30 = _____, then subtract 1 = _____

2. Use bridging through 10 to solve: 8 + 6

8 + 2 = 10, then 10 + _____ = _____

3. Use the constant difference strategy for: 83 - 37

Add 3 to both numbers: _____ - _____ = _____

4. Use addition for subtraction to solve: 92 - 38

Think: 38 + _____ = 92

📝 Multi-Step Word Problems

Success Criteria: I can break down word problems into steps and use mental math strategies

5. Sarah bought 3 books for $12 each and 2 pens for $4 each. She paid with a $50 note. How much change did she receive?

Step 1: Cost of books = _____

Step 2: Cost of pens = _____

Step 3: Total cost = _____

Step 4: Change = _____

6. A recipe serves 4 people and needs 250g of flour. How much flour is needed to serve 12 people?

Step 1: 12 ÷ 4 = _____ (how many times bigger)

Step 2: 250g × _____ = _____ grams

7. Tom runs 1.5 kilometres each morning and 2.3 kilometres each evening. How far does he run in one week?

Step 1: Daily total = _____ km

Step 2: Weekly total = _____ km

🎯 Strategy Choice Challenge

Success Criteria: I can choose the best mental math strategy for each problem

8. For each calculation, circle the BEST mental math strategy:

a) 156 - 98

Levelling (round 98 to 100)

Constant difference

Addition for subtraction

b) 25 × 16

Double and halve (25 × 16 = 50 × 8)

Break apart (25 × 10 + 25 × 6)

Bridging

9. Explain why you chose your strategy for question 8a:

Mental Math Strategies Practice

Mental Math Strategies Practice

🧠 WALT: We Are Learning To use mental math strategies

📝 Multi-Step Word Problems

🎯 Strategy Choice Challenge

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