MEP Jamaica: STRAND A UNIT 1
Decimals and Fractions:
: Estimate answers to numerical calculations
: After this lesson, the student should be able to: i) ii)
understand how to give numbers to a specified number of significant figures and/or decimal places make sensible estimates of number calculations by making suitable approximations.
: Basic number work, including decimals; significant figures, decimal places
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.
: Review homework
Revise significant figures and decimal places
Estimating answers (interactive)
Exercises (some of)
Closing activity (some of)
Relevant CSEC Questions
Glossary of terms
DS 1.6 and DS 1.7
ST 1.6, WE2
ST 1.6, Q3
ST 1.6, Q10
ST 1.6, Q4 and Q11
MC Q8 and Q9
RT, Q4, Q5, Q6, Q7
; this is where you make suitable approximations to numbers in a calculation in order to find an approximation of the final answer.
; this is where numbers are approximated in calculations (useful when estimating), e.g. 97
CIMT and e-Learning Jamaica