rotunjește la ordinul miilor urmatoarele numere naturale:

7000, 1000, 3000, 6000, 5000, 8000, 2000, 5000, 4000, 2000, 9000, 3000, 4000, 7000
6000,8000,2000,5000,4000,2000,
9000,3000,4000,7000.
600,800,200,500,400,200,900,300400,700.