Question

Find the value of $6 - 9 + 4$.

Answer 1

Hint: In order to solve this question we need to know about PEMDAS . It is the acronym which helps in remembering the order of operations needed to be performed while simplifying a question. As we read PEDMAS, letter by letter from left to right we get to know that the preference or the priorities of the operators start getting lesser. We solve the operator of higher priority first , taking the operands from either of two sides of the operator and then calculating it terms by terms as per their precedence .

Complete step by step solution:
Rewriting the question , $6 - 9 + 4$, we can see here are three terms .
And we are supposed to simplify each term to get a single answer of each and again simplify in the same manner until we get the single answer.
$6 - 9 + 4$
Using the PEMDAS, it suggests that P stands for Parentheses , E stands for Exponents , M stands for Multiplication, D stands for Division, A stands for Addition, S stands for Subtraction.
Addition and subtraction have equal powers in computing but there is a priority given to addition over subtraction.
So as per our given question addition should be performed first and thereafter Subtraction .
$6 - 9 + 4$, we now know that addition will be performed between the two positive terms we can write it as -
\[6 + 4 - 9\]
And now we got the sum which is represented as –
\[ \Rightarrow 10 - 9\]
Performing the Subtraction operation further, we get -
\[ \therefore 10 - 9 = 1\]
Now we will end simplifying here as no operator left to be performed also the answer to the original question has ended in a single answer “1”.

Note:
While performing the simplification using PEMDAS also accepts to solve by the rule of PEDMSA .
Parentheses is not an operation but can be considered as a container for operations.
It's Easier but needs to be simplified carefully as the variations in the priorities can result in obtaining wrong answers .
Multiplication and Division have the same equal powers in computing .
Also Addition and subtraction have equal powers in computing .