This chapter introduces students to Decimals, which are another way of representing fractions. It explains the concept of Tenths and Hundredths by dividing a whole into 10 or 100 equal parts. Students learn how to represent decimals on a Number Line and how to convert fractions into decimals and vice versa. The chapter also covers the comparison of decimal numbers to identify which is greater or smaller. Key operations like Addition and Subtraction of decimals are taught using place value tables, which is highly useful in real-life applications like measuring money (Rupees and Paise), length (Metre and Centimetre), and weight (Kilogram and Gram).