5 sentences

1. 我们来倒数吧。

   wǒ​men lái dào​shǔ ba.

   Let's count down.

   Source: OpenSubtitles

2. 他的成绩在班里排倒数第一。

   tā de chéng​jì zài bān lǐ pái dào​shǔ dì​yī.

   His grades are at the very bottom of the class.

   Source: Dong Chinese Dictionary

3. 大家一起倒数，迎接新年的到来。

   dà​jiā yī​qǐ dào​shǔ, yíng​jiē xīn​nián de dào​lái.

   Everyone counted down together to welcome the New Year.

   Source: Dong Chinese Dictionary

4. 在排队领奖的学生中，他排在倒数第三个。

   zài pái​duì lǐng​jiǎng de xué​sheng zhōng, tā pái zài dào​shǔ dì​sān gè.

   Among the students lining up for their awards, he is the third from the end.

   Source: Dong Chinese Dictionary

5. 2的倒数是0.5。

   2 de dào​shù shì0.5.

   The reciprocal of 2 is 0.5.

   Source: Dong Chinese Dictionary