Question

What 7.3087 rounded to the nearest thouaanth

Answer 1

7.309
The thousandth is third number to the right of the decimal. We round 5+ up and 4- we round down. 
So we round the decimal into third place, the fourth place is the 7 so we round that up, and we get 7.309

Answer 2

If you round 7.3087 to the nearest thousandth it would be 7.3090.