A dot represents a decimal point. In real life problems like measuring of length, weight, or time, the values are not exact whole numbers but rather portions of whole number. In situations where we need to be exact, we use decimal numbers.
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A dot represents a decimal point. In real life problems like measuring of length, weight, or time, the values are not exact whole numbers, but rather portions of whole numbers. In situations where we need to be exact, we use decimal numbers. In this chapter we will learn how to reduce number to 10ths, 100ths of a decimal place, to compare decimal numbers. We will also learn how to add and subtract decimal numbers, and understand how to use them in real life situations.

Money (1 paisa = Rs.0.01), Length (1 cm=0.01 m), Weight (1 g = 0.001 kg). In this topic we will consider real life problems of measurement and see how the concept of decimals can be applied in converting centimeters to meters, gram to kilogram etc.

To add decimals, we add them as though they are regular numbers, and then we place the decimal at its original position in the result. For example, 0.56 + 1.22 = 1.78. In this topic, we will practice a few problems of decimal addition to get a better understanding of this topic.