5 x [(8 + 2) - (16 - 9)]

Question

Grouping Symbols. Simplify the numerical expression

Answer 1

PEMDAS! 

 

= 5 x [10 - 7]

= 5 x 3

= 15

 

 

Answer 2

Recall order of operations: PEMDAS, Parenthesis, Exponents, Multiplication, Division, Add, Subtract.

 

Start inside and move outward; keep in mind that brackets, "[ ]", are just different types of parenthesis in this problem.

 

What's in parenthesis?

(8+2) = X

(16-9) = Y

 

... 5 x [X - Y] ... or ... 5 x [10-7] ... 5 x [3] = ?

Answer 3

We use the order of operations PEMDAS.

 

 

Parenthesis

Exponents

Multiply or Divide from left to right

Add or Subtract from left to right

 

 

Notice that we have terms in brackets and terms in parenthesis inside those brackets.  We simplify everything in brackets, the multiply the result by 5.

 

 

5 × [10 - 7] =

 

5 × 3 =

 

15