MEP Jamaica: STRAND A UNIT 1 Decimals and Fractions: Lesson Plans
CSEC Objective : Estimate answers to numerical calculations
Lessons Aims : After this lesson, the student should be able to: i) understand how to give numbers to a specified number of significant figures and/or decimal places ii) make sensible estimates of number calculations by making suitable approximations.
Prerequisite Knowledge : Basic number work, including decimals; significant figures, decimal places
Key Vocabulary :
Challenges :
Teaching Notes :
PowerPoints :
Estimation, approximation
Able students should have no difficulty here.
Less able students will struggle with understanding what approximations to make when estimating answers. They need guided practice to master this important skill so as to ensure that they will know, in the future, when their answers obtained from a calculator, are obviously incorrect.
1.5
Lesson Plan : Review homework
Revise significant figures and decimal places
Estimating answers (interactive)
Exercises (some of)
Activity
Closing activity (some of)
Homework
Relevant CSEC Questions :
DS 1.6 and DS 1.7
ST 1.6, WE2
ST 1.6, Q3
Activity 1.6
ST 1.6, Q10
ST 1.6, Q4 and Q11
MC Q8 and Q9
RT, Q4, Q5, Q6, Q7
Glossary of terms : Estimation ; this is where you make suitable approximations to numbers in a calculation in order to find an approximation of the final answer.
Approximation ; this is where numbers are approximated in calculations (useful when estimating), e.g. 97  100, 52  50
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CIMT and e-Learning Jamaica
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