The number with 1 as its order of magnitude is either a two-digit positive integer number or a real number with two digits before the decimal point. We know this because when we change the number to scientific notation, the digit to the left of the decimal point must be greater than 0.
Additionally, if the order of magnitude is 1, the decimal point was moved 1 time to the left, indicating that the original number has two digits before the decimal point. Read more