A quantity as an ordinary decimal number is a numerical value that represents a specific amount or measurement. It is written in the decimal form, with a decimal point separating the whole number and its decimal fraction.
A quantity can be represented as an ordinary decimal number by using the decimal system, where each digit has a value based on its position in the number. The first digit to the left of the decimal point represents the whole number, while the digits to the right represent the decimal fraction.
No, some quantities cannot be accurately represented as ordinary decimal numbers. For example, irrational numbers such as pi (3.14159...) or square roots (e.g. √2) cannot be fully expressed as a decimal number because their decimal representation is infinite and non-repeating.
Quantities with different units can be compared when represented as ordinary decimal numbers by converting them to the same unit of measurement. This allows for a more accurate and meaningful comparison between the quantities.
Yes, quantities as ordinary decimal numbers can be rounded to a certain number of decimal places. This is commonly done to simplify the number or to make it easier to work with in calculations. However, rounding can also introduce a small amount of error in the value of the quantity.