數學 - 圓周率 (二) (6下C)
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1.
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1 min • 1 pt
圓的圓周是 15.7 厘米,求它的直徑 (取 π=3.14)
2.
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1 min • 1 pt
圓的圓周是 22 厘米,求它的直徑 (取 π=22/7)
3.
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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.
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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.
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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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