Decimal Multiplication Practice
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Decimal Multiplication Practice
🔢 Part 1: Estimation Practice
Before calculating, estimate each answer by rounding to the nearest whole numbers.
Round 3.75 to _____ and 24 to _____
Estimated answer: _____ × _____ = _____
Round 5.68 to _____ and 32 to _____
Estimated answer: _____ × _____ = _____
Round 2.45 to _____ and 18 to _____
Estimated answer: _____ × _____ = _____
📊 Part 2: Vertical-Column Multiplication
Use the vertical-column method to multiply these decimals by two-digit whole numbers. Show all your working.
🛒 Part 3: Real-World Word Problems
Solve these problems using decimal multiplication. Remember to estimate first, then calculate.
Sarah buys 2.75 kg of apples at $4.60 per kg. What is the total cost?
Estimate: _____________
Final answer: $__________
A dressmaker needs 3.6 metres of fabric that costs $12.50 per metre. How much will the fabric cost?
Estimate: _____________
Final answer: $__________
A car uses 6.8 litres of petrol per 100 kilometres. If petrol costs $2.45 per litre, how much does the petrol cost for 100 kilometres?
Estimate: _____________
Final answer: $__________
🤔 Part 4: Understanding Decimal Multiplication
When you multiply a decimal by a whole number, the answer is always larger than the decimal you started with.
True FalseFor 2.35 × 14 = 3290, where should the decimal point go?
Why is it helpful to estimate before calculating when multiplying decimals? Write 2-3 sentences.
🎯 Part 5: Challenge Problems
A recipe calls for 1.25 cups of flour per batch. If you want to make 18 batches, how many cups of flour do you need? If flour costs $3.20 per cup, what is the total cost?
Step 1 - Amount of flour needed: _____________ cups
Step 2 - Total cost: $__________
Write a real-world word problem that involves multiplying a decimal by a two-digit whole number. Then solve it.
Your problem:
Your solution:
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