once a quarter means

Ling

2012-07-09 2:13 am

✔ 最佳答案

A quarter = 1/4
There are 12 months in a year - 1/4 of a year = 3 months
There are 24 hours in a day - 1/4 of a day = 6 hours
There are 60 minutes in an hours - 1/4 hours = 15 minutes

3 quarters = 3/4

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TOMING88

2012-07-08 11:12 pm

Ｍａｔｈｅｍａｔｉｃａｌｌｙ，３　ｍｏｎｔｈｓ＝ａ　ｐｅｒｉｏｄ　ｏｆ　ｔｈｒｅｅ　ｍｏｎｔｈｓ，ａｐｐｌｉｅｄ　ｅｓｐｅｃｉａｌｌｙ　ａｓ　ａ　ｐｅｒｉｏｄ　ｆｏｒ　ｗｈｉｃｈ　１２　ｍｏｎｔｈｓ　ｉｓ　ｃａｌｃｕｌａｔｅｄ．
ｅｇ　ｔｈｅｒｅｆｏｒｅ　１２／４＝３（ｍｏｎｔｈｓ）．
－－－Ｏｎｃｅ　ａ　ｑｕａｒｔｅｒ　ｏｆ　４　ｐａｒｔｓ，ｆｏｕｒｔｈ，ｍｅａｎｓ　ｏｎｅ　ｏｆ　ｆｏｕｒ　ｅｑｕａｌ　ｐａｒｔｓ　ｏｆ　ｓｏｍｅｔｈｉｎｇ　ｃａｌｌｅｄ　ａ　ｑｕａｒｔｅｒ　ｏｆ　ａ　ｙｅａｒ；
ｅｇ　ｔｈｅｒｅｆｏｒｅ　１２／４（ｍｅａｎｓ　ａ　ｑｕａｒｔｅｒ）＝３　ｍｏｎｔｈｓ．

參考: ｔｈｅｍｏｏｎ．

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