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Decimal numbers are a fundamental concept in mathematics, representing numbers with a fractional component using a decimal point. They are essential for precise measurements and calculations in real-life scenarios, such as money, science, and engineering. Understanding decimals is crucial for building a strong mathematical foundation. 1.1 What Are Decimal Numbers? Decimal numbers, also known as decimal notation, are numbers that consist of a combination of whole numbers and fractions. They are represented using a decimal point, which separates the whole number part from t