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數學 - 圓周率 (二) (6下C)

Authored by NT Lui

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數學 - 圓周率 (二) (6下C)
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40 questions

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1.

FILL IN THE BLANK QUESTION

1 min • 1 pt

圓的圓周是 15.7 厘米,求它的直徑 (取 π=3.14)

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

圓的圓周是 22 厘米,求它的直徑 (取 π=22/7)

3.

FILL IN THE BLANK QUESTION

1 min • 1 pt

圓的圓周是 28.26 厘米,求它的直徑 (取 π=3.14)

4.

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1 min • 1 pt

小威用一條長 44 厘米的絲帶圍出一個圓,求這個圓的直徑 (取 π=22/7)

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

子傑用滾輪在地面上轉動一周,量度得的距離是 100 厘米,求滾輪的半徑 (取 π=22/7)

6.

FILL IN THE BLANK QUESTION

1 min • 1 pt

樂樂有一條長 33 厘米的麻繩,剛好可圍繞鏡子一圈。這面鏡子的直徑是多少厘米?(取 π=22/7)

7.

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1 min • 1 pt

公園裏有一個直徑是 10 米的圓形噴水池,工人在距離噴水池的外圍 1 米築起了欄杆。欄杆的長度是多少米? (取 π=3.14)

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