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Write the value of each digit. Then add them together. For example, in 123, the 1 represents a value of 100, the 2 represents a value of 20, and the 3 represents a value of 3. Add the values together to get the expanded form, 100 + 20 + 3.

First, write the number of hundreds using words. Then, write the name of the number after the hundreds place. For example, 123 has a 1 in the hundreds place, so write “one hundred.” Then write the number after the hundreds place, “twenty-three.” In word form, 123 is one hundred twenty-three.

Another way to show the value of each digit in a number. To write a number in expanded form, write it as the sum of the values of its digits. For example, 631 = 600 + 30 + 1.