Describe all the numbers that when rounded to the nearest thousand are 645,000. due tomorrow giving 10 points

To round to the thousands, see the hundreds place

if the hundreds place is 4 or below, round down, leave the thousands place
if the hundreds place is 5 or above, round up, add 1 to the thousands place

so all the numbers tha tround to 645000 when rounded to the nearest thousadnd are the numbers from 644500 to 645499