I will solve each of the four decimal word problems step by step, checking my calculations carefully.
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Problem 1:
John ran for 3.6 km in a 5km run. How much more he has to run now to complete the 5 km run?
Step 1: Total distance = 5 km
Step 2: Distance already run = 3.6 km
Step 3: Remaining distance = 5 - 3.6
Step 4: 5.0 - 3.6 = 1.4 km
✔ Check: 3.6 + 1.4 = 5.0 → Correct.
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Problem 2:
Anne had 1.5 liter of water. How much more she has to drink if she has to complete her 2 liter bottle?
Step 1: Total needed = 2 liters
Step 2: Already drank = 1.5 liters
Step 3: More to drink = 2 - 1.5
Step 4: 2.0 - 1.5 = 0.5 liters
✔ Check: 1.5 + 0.5 = 2.0 → Correct.
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Problem 3:
Stella saw a shoe for $7.5. She gave the shopkeeper $10. How much will he return her?
Step 1: Amount given = $10.0
Step 2: Cost of shoe = $7.5
Step 3: Change = 10.0 - 7.5
Step 4: 10.0 - 7.5 = 2.5 → So, $2.50
✔ Check: 7.5 + 2.5 = 10.0 → Correct.
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Problem 4:
Chan bought 2 tickets of $3.5 and gave the ticket attendant $10. How much change will he get back?
Step 1: Cost per ticket = $3.5
Step 2: Number of tickets = 2
Step 3: Total cost = 3.5 × 2 = 7.0
Step 4: Amount given = $10.0
Step 5: Change = 10.0 - 7.0 = 3.0 → So, $3.00
✔ Check: 7.0 + 3.0 = 10.0 → Correct.
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Final Answer:
1. 1.4 km
2. 0.5 liter
3. $2.50
4. $3.00
Parent Tip: Review the logic above to help your child master the concept of decimal problems worksheet.
