Final answer:
A decimal is a number that includes a decimal point and is used to represent parts of a whole number or fractions in a more precise way. Decimals can be added, subtracted, multiplied, and divided just like whole numbers, using the appropriate rules for rounding.
Step-by-step explanation:
A decimal is a number that includes a decimal point. It is used to represent parts of a whole number or fractions in a more precise way. The decimal point separates the whole number part from the fractional part. For example, in the number 3.14, 3 is the whole number part and 14 is the fractional part.
In addition to representing fractions, decimals can also be used to represent values less than one. For example, 0.75 is a decimal that represents three-fourths or three quarters.
Decimals can be added, subtracted, multiplied, and divided just like whole numbers. When performing calculations with decimals, it is important to line up the decimal points correctly and use the appropriate rules for rounding.