Worked examples and exercises on rounding numbers to a specified nearest number or to a number of decimal places or significant figures. Four exercises in total contain over 130 questions (with answers). Exercise 4 involves estimating answers by approximating the numbers involved to 1 significant figure.
“Rounding and Estimating - Notes, Examples and Exercises” is a suitable unit of work for KS3.
Pdf and ppt versions of this resource are included in the download which contains 11 pages/slides.
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