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Write numbers in expanded form

Writing a whole number in expanded form expresses it as the sum of the values of its digits according to their places, such as 506=500+0 tens+6506 = 500 + 0\text{ tens} + 6, or 500+6500 + 6. This connects numerals with hundreds, tens, and ones, including zero’s role as a placeholder, and supports composing, decomposing, and comparing numbers through 1,000; decimals and larger place-value systems are not included.

Detailed Explanation: Write numbers in expanded form

Expanded form shows the value of each digit in a number. Look at the digit’s place:

  • Hundreds place: groups of 100100
  • Tens place: groups of 1010
  • Ones place: single units

Example: Write 704704 in expanded form.

  1. The 77 is in the hundreds place, so it is worth 700700.
  2. The 00 is in the tens place, so it is worth 00 tens, or 00.
  3. The 44 is in the ones place, so it is worth 44.

Add the place values:

704=700+0+4704 = 700 + 0 + 4

We can leave out the 00 when writing the sum:

704=700+4704 = 700 + 4

The zero is still important because it holds the tens place.

Learn by doing: Write numbers in expanded form

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Place Value - Normal to Expanded Form (Numbers)


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