# How do you evaluate 15- 2+ 1\times 3+ 4?

Jun 29, 2017

The answer is 20 and see below for the procedure!

#### Explanation:

So for this equation, since it is the Order of the Operations, I will be using PEMDAS:

P - Parentheses
E - Exponents
M - Multiplication
D - Division
S - Subtraction

Note: For multiplication and division, do whichever one that comes first in the equation and same for addition and subtraction. :)
Now, let's start working it out!

Procedure:
Parentheses:
None

Exponents:
None

Multiplication:
15−2+ **1×3** +4

$1 \times 3 = \ast 3 \ast$

Now the equation will be, 15−2+3+4!

Division:
None

Now lets move on to Addition! But, wait a second, Subtraction is before Addition in the equation so we have to do Subtraction first now! Lets solve the subtraction problem in the equation, so let's solve it now!

Subtraction:
$\ast 15 - 2 \ast + 3 + 4$
$15 - 2 = \ast 13 \ast$
The equation now is $13 + 3 + 4$!
**13+3+4** 13+3=16 16+4=20#
So our final answer is $20$!