Calculator Answers: Error Analysis & Misconceptions
Mathematics
Year 9
13 questions
~26 mins
1 views0 downloads
About This Worksheet
A worksheet exploring common errors and misconceptions when using calculator answers and rounding to 2 decimal places. Designed to develop procedural accuracy and reasoning skills.
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Full preview • 13 questions
Calculator Answers: Error Analysis & Misconceptions
Subject: MathematicsGrade: Year 9
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Untitled Worksheet
Grade Year 9
A
Fluency & Practice
Calculate each value using your calculator and round to 2 decimal places. Show your working in the grid spaces provided.
1.
Calculate 3.14159265 and round to 2 decimal places.
[2 marks]2.
Calculate 0.005678 and round to 2 decimal places.
[2 marks]3.
Calculate 123.456 and round to 2 decimal places.
[2 marks]4.
Calculate 7.899 and round to 2 decimal places.
[2 marks]B
Problem Solving & Reasoning
Use your calculator to find each value, round to 2 decimal places, and explain your reasoning where appropriate.
1.
A car travels 1234.567 km over a trip. Use your calculator to find the average speed per km if the total time was 1.234 hours. Round your answer to 2 decimal places.
[4 marks]2.
A cashier calculates a total of 78.9534 pounds. Round this to 2 decimal places before passing it to the customer.
[2 marks]3.
If a calculator displays 0.00456789, what is the value rounded to 2 decimal places?
[2 marks]C
Real-world Applications
Apply rounding to calculator answers in these practical contexts.
1.
A recipe requires 2.678 liters of milk. The calculator gives 2.67788 liters. Round to 2 decimal places before recording.
[2 marks]2.
A parcel's weight is recorded as 4.9999 kg on the calculator. Round this to 2 decimal places for customs documentation.
[2 marks]D
Challenge & Extension
Tackle these more advanced problems involving calculator answers and rounding.
1.
Calculate 987.654321 and round to 2 decimal places. Explain why rounding 4.999 to 2 decimal places results in 5.00.
[4 marks]2.
Suppose a calculator shows 0.00549, what is this rounded to 2 decimal places? Is this accurate for monetary calculations? Explain your reasoning.
[4 marks]E
Mixed Review & Error Analysis
Identify and correct the common mistakes made in these calculations.
1.
A student calculates 2.71828 and reports 2.72 after rounding to 2 decimal places. What mistake might they have made? Correct their answer.
[3 marks]2.
A calculator displays 0.004999. A student rounds this to 0.00. Is this correct? Explain and correct if necessary.
[3 marks]Quick Actions
What is Remix?
Create a new worksheet based on this one. Change the grade level, topic, number of questions, or difficulty - then generate a fresh version.
- • Change grade level (Grade 6 → Grade 7)
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- • Add more questions (10 → 15)
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet