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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
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請數學高手或數學老師幫我解答~非常急~
Feb 2nd 2014, 13:29

請數學高手幫我解答
選擇題:
1.
圓形鐵環的內半徑8公分.外半徑為10公分,今將20個這種鐵環串連成一條鐵鍊,則兩端拉直以後鐵鍊的長度為幾公分? a.324公分 b.134 c.都不對,請解釋,並寫算式和答案
2.
全校六年級學生排成一個實心方正會不夠12人,若橫列及直排均少排2人,則會多出60人,請問六年級共有多少人? a.349 b.19 c.都不對,請解釋,並寫算式和答案
3.
小哲數數,大拇指為1.食指為2.中指為3.無名指為4.小指為5.無名指為6......,數到第2007時,無名指共數了多少次? a.668 b.251 c.都不對,請解釋,並寫算式和答案

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