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Approximation and Errors Ex.1A_1

# Approximation and Errors Ex.1A_1 - (b the unit of that time...

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Chapter 1.1 Significant Figures Let’s Do Some Exercises! 1. In each of the questions below, round off the number correct to: (i) 2 significant figure (iii) 2 decimal places (ii) 3 significant figure (iv) 3 decimal places (a) 56407 (i) (ii) (iii) (iv) (b) 0.023688 (i) (ii) (iii) (iv) (c) 12.963 (i) (ii) (iii) (iv) (d) 548.6 (i) (ii) (iii) (iv) (e) 30.047 (i) (ii) (iii) (iv) (f) 0.000023467 (i) (ii) (iii) (iv) 2. Evaluate 13 2 ÷ 17 and give the answer correct to 2 significant figures. 3. Yesterday Jennie had a 1 hour 30 minutes and 15 seconds Math lesson. Change (a) the unit of that time to hours and correct the answer to 4 significant figures;

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Unformatted text preview: (b) the unit of that time to minutes and correct the answer to 2 significant figures. 4. Peter needs to prepare for the lunch. He use 75cm × 120cm newspaper to cover a table of dimensions 10m ×3.2m. (a) Estimate the area of the newspaper by first rounding off each dimension correct to 2 significant figures and give your answer in m 2 . (b) Estimate how many sheets of newspaper are needed to cover the whole table....
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