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Rules for rounding off numbers (1) If the digit to be dropped is greater than 5, the last retained digit is increased by one. For example, 12.6 is rounded to 13. (2) If the digit to be dropped is less than 5, the last remaining digit is left as it is. For example, 12.4 is rounded to 12.
Rounding to significant figures 1. Round these numbers to one significant figure: a. 543 b. 32 359 c. 12 638 d. 54 e. 21 987 f. 476 g. 2 541 209 h. 88 312 2. Round these numbers to two significant figures: a. 543 b. 32 359 c. 12 638 d. 54 e. 21 987 f. 476 g. 2 541 209 h. 88 312 3. Round these numbers to one significant figure: a.
GCSE TOPIC BOOKLET ROUNDING: SIGNIFICANT FIGURES. 1. Write down 4823 correct to 1 significant figure. Write down 7583 correct to 2 significant figures. 2. a) Write down 0.063732 correct to 3 significant figures. .........................................................................................................................................
Rounding: Signiicant Figures. Video 279a on www.corbettmaths.com. Click here. Question 1: Round each of the following numbers to 1 signiicant igure. (a) 36. (b) 22. (h) 260. (i) 741. (o) 3900.
Rounding Name: _____ Instructions • Use black ink or ball-point pen. • Answer all questions. • Answer the questions in the spaces provided – there may be more space than you need. • Diagrams are NOT accurately drawn, unless otherwise indicated. • You must show all your working out. Information
Rounding to Significant Figures 1 1 For each number given, tick the significant digits and cross the non-significant digits: 1,000 100 10 1 a) 9 2 3 4 1 10 100 1 1,000 10,000 100,000 1,000,000 or × b) 9 2 3 0 o r× c) 9 2 0 0 or × d) 9 2 0 4 or × e) 9 0 3 4 or × f) 9 0 0 0 or × g) 9 0 0 or × h) 9 0 or × i) 9 or × j) 0 9 or × k) 0 9 0 or ×
Rounding to Significant Figures. Round the following numbers to one significant figure: a) c) e) 327 à. __________. 5.5 à. __________.
