Place value to millions
Read and write the value of a digit in numbers up to the millions place.
Objective
Read and write the value of a digit in numbers up to the millions place.
What it means
Place value is the value a digit holds because of its position in a number. Each place is ten times the place to its right.
Key terms
- Place
- A digit's position in a number (ones, tens, hundreds, ...).
- Period
- A group of three digits separated by commas (ones, thousands, millions).
- Expanded form
- Writing a number as the sum of the value of each digit.
Rules to remember
- Each place to the left is 10 times the one before it.
- Commas separate periods of three digits, starting from the right.
Step by step
- 1Locate the digitCount places from the right: ones, tens, hundreds, thousands, ten thousands, hundred thousands, millions.
- 2Multiply by place valueMultiply the digit by the value of its place to find its worth.
Common mistakes
- Confusing a digit's face value with its place value.
- Miscounting places when a number has many digits.
Tips
- Say the number aloud, breaking it into groups of three (millions, thousands, ones).