What is 12 in decimal form?

The number 12 is written in decimal form as "12."

In decimal representation, each digit can take a value from 0 to 9. The position of each digit in the number denotes its weight or place value. In the number 12, the digit '1' is in the tens place, and the digit '2' is in the ones place.

When expanded, the number 12 can be expressed as: 1 * (10^1) + 2 * (10^0) = 10 + 2 = 12.