Decimal Numbers

Decimal numbers, also known as decimal fractions or simply decimals, are numbers that have a point or a comma that separates the whole number part from the fractional part. The point or comma is called the decimal point. Decimal numbers are used to express numbers that are not whole numbers, such as 3.14 (pi), 0.5 (one half), and 2.71828 (e).

The digits to the right of the decimal point represent a fraction of the whole number. Each digit represents a power of 10, starting with the tenths place, the hundredths place, and so on. For example, the decimal number 0.75 is read as "zero point seven five" and means 0 + (7/10) + (5/100) which is equal to 7.5/10 = 0.75

Decimals can be written in different ways, depending on the number of digits after the decimal point. For example, the number 0.5 can be written as 0.50, or even 0.50000.

You can also convert a decimal number to a fraction or a percentage. For example, 0.75 can be written as 75/100, or 75%.

You can perform mathematical operations such as addition, subtraction, multiplication, and division with decimal numbers, and you can use calculator or manual calculation.

It's important to be careful with the place value when performing mathematical operations with decimal numbers, and make sure to use the correct number of decimal places, otherwise the answer may not be accurate.