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8th Class Mental Ability Mathematical Operations Mathematical Operations

Mathematical Operations

Category : 8th Class

There are four fundamental operations. These are addition (+), subtraction (-), multiplication (x) and division.

Whenever two or more of these operations occur simultaneously, we overcome on such complex situation by applying the 'B 0 D M A S' rule.

This chapter is on the basis of the 'B 0 D M A S' rule. Let us explain this rule briefly.

We solve an expression first for 'bracket'(if available), then for of (if available). This process goes up to subtraction.

 

 

EXAMPLE

 

Which one of the four interchanges in signs and numbers would make the equation  true?

(a) 2 and 3,  and      (b) 6 and 2, and

(c) 3 and 6, and =       (d) 3 and 6,  and

 

Explanation (d):

By applying given interchanges, we get option (d) which satisfies the equation.

 becomes which is true.

So the correct option is (d).

 

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