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複式洋房

積分: 242


1#
發表於 10-10-24 09:43 |只看該作者
問題係咁既:

1. give the greatest possible error:
(0.082 +/- 0.0005) cm

2. if a strip of paper measures 3.68 cm to the
nearest 0.01 cm, then it is longer than
? cm and shorter than ? cm


萬分感激!


男爵府

積分: 5929


2#
發表於 10-10-24 10:43 |只看該作者
2. longer than (or equal to) 3.675cm and shorter than (or equal to) 3.684cm

please correct me if i am wrong...



原帖由 Lincolnmum 於 10-10-24 09:43 發表
問題係咁既:

1. give the greatest possible error:
(0.082 +/- 0.0005) cm

2. if a strip of paper measures 3.68 cm to the
nearest 0.01 cm, then it is longer than
? cm and shorte ...


複式洋房

積分: 242


3#
發表於 10-10-24 12:07 |只看該作者
唔好意思, 我唔係幾明白, 可否解釋一下? 謝謝!



原帖由 TSX 於 10-10-24 10:43 發表
2. longer than (or equal to) 3.675cm and shorter than (or equal to) 3.684cm

please correct me if i am wrong...


珍珠宮

積分: 39762

開心吸收勳章 醒目開學勳章


4#
發表於 10-10-24 13:35 |只看該作者
原帖由 Lincolnmum 於 10-10-24 09:43 發表
問題係咁既:

1. give the greatest possible error:
(0.082 +/- 0.0005) cm

2. if a strip of paper measures 3.68 cm to the
nearest 0.01 cm, then it is longer than
? cm and shorte ...


我的理解是:
1. anywhere between 0.0815 and 0.0825;
2. it is longer than 3.675cm and shorter than 3.684cm (以4捨5入,小數點後3位計)


子爵府

積分: 10202

好媽媽勳章 醒目開學勳章


5#
發表於 10-10-24 23:42 |只看該作者
1. Definition: The greatest possible error of a measurement is one half of the unit of measure to which the measure is being rounded.

題目中(0.082 +/- 0.0005) cm代表這個MEASUREMENT係correct to nearest 0.001cm,所以greatest possible error 是0.001cm/2 = 0.0005cm

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