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第13章 數值估算

Authored by Mathematics CCASS

Mathematics

7th Grade

Used 1+ times

第13章 數值估算
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 π=\pi=  

3.14 (準確至三位小數)

3.141 (準確至四有效數字)

3.1416 (準確至五有效數字)

3.14159 (準確至六位小數)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

0.044 549 2=

0.04 (準確至二位有效數字)

0.045 (準確至三位小數)

0.044 54 (準確至四位有效數字)

0.044 549 (準確至五位小數)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

0.098 764 3 =

0.098 (準確至四位小數)

0.0987 (準確至四位小數)

0.098 76 (準確至四位有效數字)

0.098 77 (準確至四位有效數字)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

0.020 898 98 =

0.020 89 (準確至六位小數)

0.020 898 (準確至六位小數)

0.020 899 (準確至六位有效數字)

0.020 899 0 (準確至六位有效數字)

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

把一個數捨入至三位有效數字後,所得的值是0.0500。該數可能是

0.0499。

0.049 94。

0.049 995。

0.050 05。

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

把一個數捨入至N位有效數字,所得的結果是320 000。下列何者不是N的可能值?

1

2

3

4

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

一打雞蛋的售價是$21.3。穎琦在購買3.5打雞蛋時用了估算計算需付的總金額,理由是

可以簡化計算。

售價隨時間改變。

售價是未知量。

不能求得需付金額的真確值。

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