upper_lower_limits 2018-04-10.pdf

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2018/4/10 網上問題紙 1/2 評語 : 1) 2008 Q16 If the radius of a sphere is measured as 8 cm correct to the nearest cm, then the least possible surface area of the sphere is (16 分數 ) A. 64 π cm 2 . B. 225 π cm 2 . C. 256 π cm 2 . D. 1125 π 2 cm 2 . 解釋 : -- 參考資料 : -- 評語 : 2) 2010 Q17 If the length and the breadth of a rectangle are measured as 12 cm and 10 cm respectively and all the measurements are correct to the nearest cm, then the least possible area of the rectangle is (16 分數 ) A. 99 cm 2 . B. 109.25 cm 2 . C. 120 cm 2 . D. 131.25 cm 2 . 解釋 : -- 參考資料 : -- 評語 : 3) SP Q15 The lengths of the three sides of a triangle are measured as 15 cm , 24 cm and 25 cm respectively. If the three measurements are correct to the nearest cm , find the percentage error in calculating the perimeter of the triangle correct to the nearest 0.1% . (17 分數 ) A. 0.8% B. 2.3% C. 4.7% D. 6.3% 解釋 : -- 參考資料 : -- 評語 : 4) 2012 Q14 The length of a piece of thin string is measured as 25 m correct to the nearest m.

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• Fall '14
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• Limits, Height, Orders of magnitude, nearest cm

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