ZIMSEC O-Level Mathematics
1.2Approximations and estimations
Approximations and estimations in ZIMSEC O-Level Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic40 practice questions2 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 1.2.1Round numbers to a given number of decimal places or significant figures and to a sensible accuracy for a problem.
- 1.2.2Estimate quantities and the results of calculations.
- 1.2.3Find upper and lower bounds of values given to a stated accuracy, and of the results of simple calculations with them such as the area of a rectangle.
Lessons
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Estimation and rounding
30 min
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Limits of accuracy
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
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