Numbers can be written in lots of different ways. For example, a number can be written in numerals, words, expanded form, and a mix of numerals and words (or place value). So 2,451 can be written as:
• 2 thousands, 4 hundreds, 5 tens, and 1 one
• 2,000 + 400 + 50 + 1
• two thousand, four hundred, and fifty-one.

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