Question

9th grade math easy pls help and show how you solved it

Solve the following problems using the order of operations: PEMDAS.
1) 7(2+5).
2) 10- (2*3) +9.
3) 2^2+3 (5-2)

Answer 1

49 , 13 , 13

Explanation:

following the order of operations as stated in PEMDAS

that is parenthesis, exponents, multiplication, division, addition, subtraction

(1)

7(2 + 5) ← evaluate parenthesis

= 7 × 7 ← evaluate multiplication

= 49

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(2)

10 - (2 × 3) + 9 ← evaluate parenthesis

= 10 - 6 + 9 ← evaluate from left to right

= 4 + 9

= 13

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(3)

2² + 3(5 - 2) ← evaluate parenthesis

= 2² + 3 × 3 ← evaluate exponent and multiplication

= 4 + 9

= 13