<span>The place value of the second 9 in 399 is thousands. 399,713 rounded to the nearest thousand is 400,000 because the digit in the place value column to the right is higher than 5.</span>
The third digit in 399 is 9. To round to this place value, we inspect the digit behind it. If the digit is 5 or greater, we round up; if it is less than 5, we round down.
The digit behind 9 is 7. Since it is greater than 5, we round up. This would ordinarily put the number up 1; however, doing that makes the 9 a 10, which in turn makes the next number 10, and the next number 4. This gives us 400,000.
Find the total area of the room 109 * 103 = <span>11227 inches^2 the tile takes up 3*3 = 9 inches^2 11227/9 = </span><span>1247.4 You need 1247 tiles and 0.4 of a tile. Or you could just get 1248 and cut the last tile a bit :P
