How do you write 1 million in expanded form?

To write 1 million in expanded form, you would break down the number based on its place value. 1 million is composed of 1,000,000, which can be expanded as 1 x 1,000,000. This means there is 1 in the millions place, and 0 in the hundred thousands, ten thousands, thousands, hundreds, tens, and ones places.