六分之一
英文的分數直接借用序數詞當分母：把一個東西平分成六份，每一份就用「第六」這個字來叫。
one-sixth fraction · noun · A2
One of six equal parts of something; the fraction one-sixth (1/6).
六分之一
核心畫面
Picture six people standing in a line. Count along and stop: the sixth is the one that closes the group. Six tells you how many; sixth tells you which position. Once you can point at that position, the fraction follows — cut a cake into six equal parts, and each part is a sixth.
可以想成六個人排成一排，從頭數過去停下來：第六個就是把這一組收尾的那一個。six 講的是「幾個」，sixth 講的是…更多收起
可以想成六個人排成一排，從頭數過去停下來：第六個就是把這一組收尾的那一個。six 講的是「幾個」，sixth 講的是「第幾個」。只要能指出那個位置，分數的用法就自然接上了：把蛋糕切成六等份，每一份就是 a sixth。From the picture
Also in this word
sixth in order · adjective · A2
Coming after five other people or things in an order; number six in a series.
第六的
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
sixthadj/sɪksθ/
- 1
The ordinal form of the number six.
- And * God ſaw euery thing that hee had made : and behold, it was very good. And the euening and the moꝛning were the ſixth day.
- Dr. Ridpath, in his usual happy manner, thanked the Executive Committee and the various members of the Association who had so earnestly cooperated with him in the work of the Sixth Annual Meeting now drawing to a close.
sixthnoun/sɪksθ/
- 1
The person or thing in the sixth position.
- 2
One of six equal parts of a whole.
- On the moon, however the weight of a pound-mass (lb or lbm) is only about one sixth of a pound-force (lbf).
- 3
entertainmentlifestylemusicThe interval between one note and another, five notes higher in the scale; for example C to A, a major sixth, or C to A flat, a minor sixth.
sixthverb/sɪksθ/
- 1
rareinformalTo divide by six, equivalent to multiplying a denominator by six.
- Why would anyone use sixthing when any (N − a²) divisible by 6 would also be divisible by 3? The answer is that sometimes the numerator and/or the denominator is simpler in sixthing,
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。