2 sentences for 算数 (suàn​shù — count numbers)

1. 我算数挺好的。

   wǒ suàn​shù tǐng hǎo de.

   I'm pretty good with numbers.

   Source: OpenSubtitles

2. 这个五岁的孩子已经学会算数了。

   zhè gè wǔ suì de hái​zi yǐ​jīng xué​huì suàn​shù le.

   This five-year-old child has already learned how to do arithmetic.

   Source: Dong Chinese Dictionary