Rounding means changing a number to a nearby number that is easier to work with or understand. We usually round to the nearest ten, hundred, or thousand.
Think of rounding like finding the closest landmark. If you're between two houses, you go to the one that's closer.
To round a number, look at the digit to the right of the place you're rounding to. If it's 5 or more, round up. If it's 4 or less, round down.
When rounding up, the digit in the place you're rounding to increases by 1, and all digits to the right become zeros.
When rounding to the nearest hundred, look at the tens digit. If it's 5 or more, round up. If it's 4 or less, round down.
Numbers ending in 50 always round up to the next hundred. For example, 350 rounds to 400, not 300.
Sometimes you'll need to figure out what a number could be based on how it rounds. These are called rounding puzzles.
When solving rounding puzzles, think about all the possible numbers you can make with the given digits that would round to the target number.
Let's solve the puzzle step by step using the digits 6, 5, and 2.
Some rounding puzzles have more than one correct answer. Always check all possibilities.