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Integers (Copy 1)
Addition and subtraction of integers (Recap) Multiplication of integers Division of integers Properties of integers Word Problems Quiz Assignment Q and A section for discussion Live Interaction for Understanding topics. Ask Doubt Through Chat.
CBSE Class 8 Mathematics
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Integers are a fundamental concept in mathematics and are used in various fields of study, such as science, engineering, finance, and computer science. Integers are whole numbers that can be positive, negative, or zero, and they are denoted by the symbol “Z”.

One real-world scenario where integers are used is in the measurement of temperature. The temperature is often measured in degrees Celsius or Fahrenheit, which are represented by integers. For example, if the temperature is 20 degrees Celsius, it can be represented by the integer 20. If the temperature drops to -5 degrees Celsius, it can be represented by the integer -5.

Another example where integers are used is in the calculation of profit or loss in business. Suppose a business sells a product for $50 and the cost of production is $30. The profit can be calculated by subtracting the cost from the selling price, which gives us 50 – 30 = 20. This profit of $20 can be represented by the integer 20. However, if the cost of production is more than the selling price, the business incurs a loss, which can be represented by a negative integer.

Integers also play a crucial role in scientific experiments and research. For instance, if a scientist is measuring the speed of sound in air, they might use integers to represent the time it takes for the sound to travel a certain distance. The distance can be represented by a positive integer, and the time can be represented by a negative integer.

In computer science, integers are used in various programming languages to perform arithmetic operations and logical comparisons. For example, a programmer might use integers to represent the number of iterations in a loop, the size of an array, or the index of a particular element in a list.

The properties of integers, such as closure, associative, commutative, identity, and inverse, play an essential role in solving mathematical problems involving integers. For instance, the closure property ensures that the result of adding, subtracting, or multiplying two integers is always an integer. The associative property allows us to group integers in any way we want, while the commutative property allows us to change the order of the numbers without affecting the result.

In conclusion, integers are an essential concept in mathematics that have numerous real-world applications. They play a vital role in scientific research, business, engineering, and computer science, among other fields. By understanding the properties of integers and their applications, we can solve mathematical problems more efficiently and make better decisions in real-world scenarios.

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