How do you write 2.7 in expanded form?

To write 2.7 in expanded form, you would break down the number into its individual place values. In this case, 2.7 can be expressed as (2 x 1) + (7 x 0.1), which simplifies to 2 + 0.7. Therefore, the expanded form of 2.7 is 2 + 0.7.