Use of Brackets
Use of Brackets
Brackets are symbols, such as parentheses, that are most often used to create groups or clarify the order that operations are to be done in an algebraic expression. Some bracket symbols, however, have multiple special uses in mathematics.
Mathematical brackets used for grouping. These brackets can include:
When used for grouping, brackets always come in pairs. There will be an opening bracket and a closing bracket.
Brackets are used to provide clarity in the order of operations, the order in which several operations should be done in a mathematical expression.
For example, suppose you have the following expression:
2 + 4 X 6 - 1. there is only one correct answer to that expression. You perform multiplications and divisions, moving from left to right, before you perform additions and subtractions, also moving from left to right. Performing the multiplication first, you get
2 + 24 - 1 = 25.
What if, instead, you wanted to do the addition and subtraction first (and then multiply the results)?
We will use brackets. Now the problem becomes:
(2 + 4) X (6 - 1) = 6 X 5 = 30.
In this example, the parentheses tell us to perform certain operations first that is different than the usual order of operations. Other times, they are simply used for visual clarity.
Illustration: Product of 25 , 3 and 9 is added with the product of 6 and 56 then subtracted with 575. Find the correct for the arrangement of given statement using brackets ?
Solution: We will analyse the statement given in the question
First it is given to find the product of 25,3 and 9. this can be expressed as
25 X 3 X 9
We have to add the product of 6 and 56. So the expression becomes
(25 X 3 X 9) + ( 6 X 56)
575 is to subtracted from the result so the expression becomes
[ (25 X 3 X 9) + ( 6 X 56) ] - 575
Hence the expression representing the statement is [ (25 X 3 X 9) + ( 6 X 56) ] - 575
Simplify the Expression : (120 - 90) + 180 | |||
| Right Option : D | |||
| View Explanation | |||
Solve : (2 + 4) - ( 6 - 3) | |||
| Right Option : C | |||
| View Explanation | |||
Simplify the following expression : | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
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Sharandeep Singh
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Manya
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Shivam Rana
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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