🧮 Part 1: Quick Mental Calculations

Instructions: Solve these problems mentally first, then show your working. Use estimation to check if your answers are reasonable.

1. 47 + 38 = _______

My estimation: _______ (round to nearest 10)

2. 156 - 89 = _______

My estimation: _______ (round to nearest 10)

3. 23 × 16 = _______

My estimation: _______ (round to nearest 10)

4. 144 ÷ 12 = _______

My estimation: _______ (think about times tables)

🛒 Part 2: Real-Life Shopping Problems

Scenario: You're planning a school barbecue and need to calculate costs and quantities.

5. Sausages cost $12.50 per pack and bread rolls cost $3.80 per pack. If you buy 4 packs of sausages and 6 packs of bread rolls, what is the total cost?

Show your working step by step:

Sausages: _______ × _______ = $_______

Bread rolls: _______ × _______ = $_______

Total cost: $_______ + $_______ = $_______

6. You have $150 to spend on drinks. Each carton of juice costs $8.75. How many cartons can you buy and how much change will you have?

Number of cartons: _______

Change remaining: $_______

👨‍🍳 Part 3: Cooking Calculations

Scenario: You're making anzac biscuits for the school fair and need to adjust recipe quantities.

7. A recipe serves 24 people but you need to serve 72 people. The original recipe calls for 450g of flour. How much flour do you need?

First, work out how many times bigger: 72 ÷ 24 = _______

Then multiply the flour: 450g × _______ = _______g

8. You have 2.5kg of sugar and each batch of biscuits uses 375g. How many complete batches can you make?

Convert to same units: 2.5kg = _______g

Number of batches: _______g ÷ 375g = _______ complete batches

🎯 Part 4: Choose Your Operation

Instructions: For each problem, circle which operation you need, then solve it.

9. The school has 1,248 students. If they are divided equally into 24 classes, how many students are in each class?

Addition

Subtraction

Multiplication

Division

Answer: _______ students per class

10. A concert hall has 45 rows with 38 seats in each row. What is the total seating capacity?

Addition

Subtraction

Multiplication

Division

Answer: _______ seats

💰 Part 5: Multi-Step Money Problems

11. Sarah earns $18.50 per hour working at a café. She works 15 hours per week. After paying $45 for transport each week, how much money does she have left?

Step 1 - Weekly earnings: $_______ × _______ hours = $_______

Step 2 - Money left: $_______ - $_______ = $_______

12. A family of 4 goes to the movies. Adult tickets cost $16.50 each and child tickets cost $12.00 each. If there are 2 adults and 2 children, and they buy a family popcorn for $18.50, what is their total cost?

Adult tickets: _______ × $_______ = $_______

Child tickets: _______ × $_______ = $_______

Popcorn: $_______

Total cost: $_______ + $_______ + $_______ = $_______