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Challenging Decimal Operations Worksheet

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Challenging Decimal Operations Worksheet

Challenging Decimal Operations Worksheet

Decimal operations illustration

🔢 Part 1: Adding Decimals

1. Calculate the following decimal additions. Show your working:

a) 15.67 + 8.94 = _______

b) 23.456 + 7.89 = _______

c) 0.758 + 12.6 + 3.45 = _______

2. Sarah bought a book for $12.75, a pen for $3.40, and a notebook for $5.85. How much did she spend in total?

Answer: $ _______

➖ Part 2: Subtracting Decimals

3. Calculate the following decimal subtractions. Show your working:

a) 45.82 - 17.67 = _______

b) 100.5 - 23.789 = _______

c) 8.006 - 2.458 = _______

4. A recipe calls for 2.75 kilograms of flour. Tom has already used 1.48 kilograms. How much flour does he have left to use?

Answer: _______ kilograms

🧮 Part 3: Mixed Operations

5. Solve these challenging problems step by step:

a) 56.78 + 23.45 - 19.67 = _______

b) 100 - 45.678 + 12.34 = _______

6. Emma had $75.50 in her savings account. She deposited $23.75 on Monday and withdrew $18.95 on Wednesday. How much money does she have now?

Answer: $ _______

🎯 Part 4: Multiple Choice Challenge

7. Which of these equals 45.67 + 23.89?

69.46

69.56

68.56

70.56

8. What is 100.25 - 67.89?

32.36

33.36

32.46

33.46

🏆 Part 5: Problem Solving Challenge

9. At the school athletics carnival, the winning long jump distances were:

• Year 3: 2.45 metres

• Year 4: 2.78 metres

• Year 5: 3.12 metres

• Year 6: 3.67 metres

a) What is the total distance of all four jumps combined?

Answer: _______ metres

b) How much further did the Year 6 student jump compared to the Year 3 student?

Answer: _______ metres

10. Challenge Problem: Fill in the missing numbers to make these equations correct:

a) 25.67 + _______ = 50.00

b) _______ - 18.45 = 31.78

c) 12.5 + 7.89 - _______ = 15.64

💭 Part 6: Reflection

11. Explain in your own words the most important rule to remember when adding or subtracting decimals:
12. Which type of decimal problem did you find most challenging today and why?
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