Use place value understanding to round multi-digit whole numbers to any place

What you'll learn

1. Round a multi-digit whole number to any specified place (tens, hundreds, thousands, ten-thousands, hundred-thousands)
2. Use a number line model to explain why a number rounds to a particular multiple of the rounding unit
3. Apply the midpoint convention — when a number is exactly halfway between two multiples, round up
4. Explain the effect of rounding on digits: digits to the left of the rounding place stay the same, digits to the right become zero
5. Use rounding to produce reasonable estimates for real-world quantities such as costs, populations, and distances

Prerequisites

• Recognize that in a multi-digit number, a digit in one place represents ten times what it represents in the place to its right