Question

Add the followings 3mn, - 5mn, 8mn, - 4mn

Answer 1

Hint: In these types of questions first check that each term has the same variables or not and as in this question we have to use the addition operation which is represented as “+”, use this information to approach the solution.

Complete step-by-step solution:
According to the given information, we have terms $3mn, - 5mn, 8mn, - 4mn$
So, as we all know that terms which have the same variable thus this indicates that each term are like terms
And we also know that terms which have the same variable are added directly
So, now using the operation of addition to add the given terms we get
$3mn + (- 5mn) + 8mn + (- 4mn)$
$ \Rightarrow 3mn – 5mn + 8mn – 4mn$
$ \Rightarrow 11mn – 5mn – 4mn$
$ \Rightarrow 11mn – 9mn$
$ \Rightarrow 2mn$
Therefore, the addition of $3mn, - 5mn, 8mn, - 4mn$ will be $2mn$.

Note: In the above solution we came across the term “Arithmetic operation” which consists of four basics category of operations such as Addition operation, subtraction, multiplication, and division here addition operation requires at least two operands for example a + b where a, b are operands and + is the operator and almost all the Arithmetic operators require two operands to operate.