Round 431,857 to the nearest ten thousans

The #3 is the in the ten thousand's place, so that's the number you are rounding. You now look to the place to the right of the 3, which is the thousand's place and is a 1. In order for a number to go up, the number to the right has to be greater than 5. If it's not, then the number you are rounding stays the same. So in this case, the 1 is less than 5, which makes the 3 stay the same. While everything to the right of the number turns into 0s, everything to the left (of the number you are rounding) stays the same. Your new answer would be 430,000. Hope that helps and makes sense. (:

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer