Find the value of the following expression: \(\frac{{3 \div 1 \times 2 + 5 - 2}}{{3 \times 3 - 2}}\)
To find the value of the given expression, we need to follow the order of operations. A commonly used rule for the order of operations is BODMAS or PEMDAS.
BODMAS stands for:
PEMDAS stands for:
Both rules give the same result as they represent the same hierarchy of operations.
The given expression is:
\(\frac{{3 \div 1 \times 2 + 5 - 2}}{{3 \times 3 - 2}}\)
We will evaluate the numerator and the denominator separately.
The numerator is \(3 \div 1 \times 2 + 5 - 2\).
Applying the BODMAS/PEMDAS rule:
So, the value of the numerator is 9.
The denominator is \(3 \times 3 - 2\).
Applying the BODMAS/PEMDAS rule:
So, the value of the denominator is 7.
Now, we combine the values of the numerator and the denominator:
\(\frac{\text{Numerator}}{\text{Denominator}} = \frac{9}{7}\)
The value of the expression is \(\frac{9}{7}\).
| Rule | Order | Operations |
|---|---|---|
| BODMAS/PEMDAS | 1st | Brackets/Parentheses |
| 2nd | Order/Exponents (powers, roots) | |
| 3rd | Division and Multiplication (left to right) | |
| 4th | Addition and Subtraction (left to right) |
It is crucial to apply the BODMAS or PEMDAS rule carefully. When you have a mix of division and multiplication or a mix of addition and subtraction, you must perform these operations from left to right as they appear in the expression. They have equal priority.
For example, in \(6 \div 2 \times 3\):
Similarly, in \(10 - 3 + 5\):
Always work from left to right for operations at the same priority level (Division/Multiplication or Addition/Subtraction).
Which fraction among the following is the least ?
\(\frac{5}{11}, \frac{7}{12}, \frac{8}{13}, \frac{9}{17}\)
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