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小六數學練習卷......急啊

Mar 25th 2014, 09:56

1.正十二邊形的內角和是1800度,正八邊形的內角和是1080度,所以1800-1080=720,所以答案是4.

2.1和2差1,2和4差2,4和7差3,以此列推,甲是7+4=11,乙是16+6=22,丙是29+8=37,丁是46+10=56,11+22+37+56=136,所以答案是4.

3.9平方公分的正方形邊長是3公分,3*30=90,但如果是排兩排的話,答案就是45公分,選擇4

4.答案是1

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