On Monday the 2nd of October, we were learning in maths, rounding. 
If your number is 15 and you rounding to the nearest 10, it would be 20 
because if it was 14 and you were rounding to the nearest ten it would be 10. 

15,243 rounded to the nearest 1,000 is 15,000. 
693 rouded to the nearest 10 is 700. 
3,823 roundeed by the neares-t 1,000 is 4,000