Round each number to the nearest 10.
47 →
8 →
327 →
Estimate each problem to the nearest 10.
63 + 28 → + =
147 – 97 → – =
A farmer has 27 rows of corn. Each row produces 315 corn stalks. How many corn stalks does the farmer have?
2,835 corn stalks
8,605 corn stalks
8,515 corn stalks
8,505 corn stalks