Exactly as in the question: three = 3
Three.
Three hundredths as a decimal number 0.03
3.3
To write twelve and three tenths as a decimal, write the number twelve as a whole number to the left of the decimal place and three tenths as three to the right of the decimal place. It appears as 12.3
3
3n
300.
To write one billion three million, you would write out the number 1,003,000,000.
Three is a number, three hundred is a number, three hundred forty is a number, three hundred forty-two is a number, forty is a number, forty-two is a number, forty-two hundred is a number, two is a number, and two hundred is a number, but three hundred forty-two hundred is not a number.
323,000
To write "three thousand two hundred," you would simply write the number as 3,200.
Expressed as a mixed number in its simplest form, 3.15 is equal to 3 3/20 or three and three twentieths.