The numbers used to represent numbers smaller than unit 1 are called decimal numbers. The decimal point or the period plays a significant part in a Decimal Number. This period separates the fractional part and whole number part in a decimal number. We use Decimals in our daily lives when we deal with money, length and weight of materials etc. It provides an accurate value of the required things. Chapter 7 Decimals shows Introduction, Decimals as an extension of place value table, Decimals as Fractions, Expressing Fractions as Decimals, Expressing Decimals as Fractions. Comparing Decimals, Some uses of Decimal Notation, Equivalent Decimals, Like and Unlike Decimals, Addition of Numbers with Decimals and Subtraction of Numbers with Decimals.