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Rounding Estimation and Approximation — Free MYP1 Mathematics Practice Questions
1QuestionEstimating Products and QuotientsConcept Practice
2 marks~3 minCriterion D
You want to buy 8 movie tickets. Each ticket costs approximately 12 dollars.
a
Calculate the estimated total cost of 8 tickets. State whether 100 dollars is enough to pay. [1]
b
Describe whether your estimate is an overestimate or an underestimate if the actual ticket price is 11.50 dollars. [1]
Solutions
2QuestionRounding Whole NumbersConcept Practice
3 marks~5 minCriterion C
The bar chart shows the number of people who attended a school concert each year. The attendance figures have been rounded to the nearest hundred.
Year 1: — Year 2: — Year 3: — Year 4:
Year 1: — Year 2: — Year 3: — Year 4:
a
Identify the trend in attendance shown by the rounded figures. [1]
b
Describe what it means to round a number to the nearest hundred. [1]
c
Give an example to show how rounding to the nearest hundred could hide a real change in attendance between two years. [1]
Solutions
3QuestionEstimating Products and QuotientsConcept Practice
3 marks~5 minCriterion B
A student estimates division answers by rounding the starting number to a compatible number.
| Starting number | compatible number: | divisor: | estimate: | actual answer: | |
|---|---|---|---|---|---|
| Starting number | compatible number: | divisor: | estimate: | actual answer: |
a
Identify whether the compatible number is greater than or less than . [1]
b
Describe what happens to the estimated answer when the compatible number is greater than the starting number. [1]
c
Compare the two estimates above and describe how the direction of rounding affects whether each estimate is too high or too low. [1]
Solutions
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