'51.93' is not an equation. It's a number. When you write or speak it, it comes out "fifty-one and ninety-three hundredths".
write something about math. then change the words to make it rhyme
One and three tenths.
Twice a number would be written as 2x.
Write a number with a pencil. If you erase it, then it DISAPPEARS!
Forty five point four nine.
Twenty-seven and eighty-seven thousandths.
word form is using words to write a #
2n + (-5)
That probably means that you describe something in words.
numerator, number, negative
9 to the power of 2 = 81