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
To write one billion three million, you would write out the number 1,003,000,000.
3
3n
300.
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.