What is 1+3-5+2×3+5-2+7?

Answer 1

1+3-5+2x3+5-2+7

PEMDAS is what most people say, I use GEMA which stands for:

Grouping (parentheses, brackets, or numerator/denominator of a fraction)

Exponents

Multiplication/Divison - it's whichever comes first in the problem (multiplication is the inverse of division)

Addition/Subtraction - whichever comes first in the problem (addition is the inverse of subtraction)

In this problem, there is addition, subtraction, and multiplication. So per GEMA, we do multiplication first, then the addition and subtraction, left to right.

1+3-5+2x3+5-2+7

1+3-5+(2x3)+5-2+7

(1+3)-5+(6)+5-2+7

(4-5)+6+5-2+7

(-1+6)+5-2+7

(5+5)-2+7

(10-2)+7

(8+7)

15

Answer 2

For the order of operations, multiplication comes before addition and subtraction (PEMDAS) So first step is the 2x3

1+3-5+6+5-2+7

From this point on, the order doesn't matter since it is all addition and subtraction. Working left to right is one option.

4-5+6+5-2+7

-1+6+5-2+7

5+5-2+7

10-2+7

8+7 = 15