9 ones, or 9
Chat with our AI personalities
The number system we commonly used, known as the decimal system, has 10 digits (0 to 9). It is possible to use other number systems, with a different number of digits. Any numbering system based on the same principle (the principle of place-value) must use 2 or more digits.
0 1 2 3 4 5 6 7 8 9
To write 3.45 as a reduced mixed number, first separate the whole number part (3) from the decimal part (.45). Next, convert the decimal part to a fraction by placing the decimal value (45) over the place value of the decimal (100), which gives you 45/100. Simplify this fraction by dividing both the numerator and denominator by the greatest common factor, which is 5 in this case. This gives you 9/20. Therefore, 3.45 as a reduced mixed number is 3 9/20.
A decimal number is simply a way of representing a number in such a way that the place value of a one is ten times that of a one in the place to its right. If it does not contain a fractional part then the decimal representation does not require a decimal point. So the decimal for 91000 is 91000 – as in the question.
Absolute value of -9 is 9.