除以16, 是先除以8 再除以2 ,也是幾兩等於幾斤的轉換. 1/16=0.0625 2/16=0.125 ----> 1/8 3/16=0.1875 4/16=0.25 ----> 2/8 = 1/4 5/16=0.3125 6/16=0.375 ----> 3/8 7/16=0.4375 8/16=0.5 ----> 4/8 = 2/4 = 1/2 9/16=0.5625 10/16=0.625 ----> 5/8 11/16=0.6875 12/16=0.75 ----> 6/8 = 3/4 13/16=0.8125 14/16=0.875 ----> 7/8 15/16=0.9375 16/16=1 ----> 8/8 = 4/4 = 2/2
要熟悉這順序: 0625,1250,1875,2500, 3125,3750,4375,5000, 5625,6250,6875,7500, 8125,8750,9375,10000
各數不斷除以2 的序列: 1, 0.5, 0.25, 0.125, 0.0625, 2, 1, 0.5, 0.25, 0.125, 3, 1.5, 0.75, 0.375, 0.1875, 4, 2, 1, 0.5, 0.25, 5, 2.5, 1.25, 0.625, 0.3125, 6, 3, 1.5, 0.75, 0.375, 7, 3.5, 1.75, 0.875, 0.4375, 8, 4, 2, 1, 0.5, 9, 4.5, 2.25, 1.125, 0.5625, 10, 5, 2.5, 1.25, 0.625, 11, 5.5, 2.75, 1.375, 0.6875, 12, 6, 3, 1.5, 0.75, 13, 6.5, 3.25, 1.625, 0.8125, 14, 7, 3.5, 1.75, 0.875, 15, 7.5, 3.75, 1.875, 0.9375, 16, 8, 4, 2, 1,
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