Hello Amontessemprit,
Answer: $1.00 = 1
How I got my answer,
Rewrite the decimal number as a fraction with 1 in the denominator
$1.00 = $1.00/1
Multiply to remove 0 decimal places. Here, you multiply top and bottom by 10^0
$1.00/1 × 1/1 = 1/1
Simplify the improper fraction, = 1
In conclusion, $1.00 = 1