Place value is the value of a digit depending on where it is in a number. Each place (ones, tens, hundreds) shows how much the digit is worth.
Each place to the left is worth 10 times more than the one before it.
Look at the position of each digit in the number. The digit’s place tells you its value.
You can break apart numbers using place value. This is called expanded form.
Numbers up to 1,000 are built using hundreds, tens, and ones. The largest three-digit number is 999.
A zero in a place means there are no groups of that value.
Compare numbers by looking at the largest place first. Start with the hundreds, then tens, then ones.
Always compare digits starting from the left. Stop when you find the first difference.
You can use place value to help add and subtract by regrouping (borrowing or carrying) hundreds, tens, and ones.
Regrouping helps when the ones or tens are too large or too small to add or subtract easily.