RAUL B. answered • 12/15/15

Raul - Tutor and mentor of math

add: 6 + 10 = 16 add : -6 + 10 = 4

subtract: 8 - 16 = -8 subtract : is wrong

What am I doing wrong? add : 8 + 4 = 12 correct answer

Alex A.

asked • 09/11/14If you solve this according to the Order of Operations you would:

multiply: 2 * 3 = 6

add: 6 + 10 = 16

subtract: 8 - 16 = -8

What am I doing wrong?

Follow
•
4

Add comment

More

Report

RAUL B. answered • 12/15/15

Tutor

4
(4)
Raul - Tutor and mentor of math

Alex correct

multiply: 2 * 3 = 6 multiply: -2*3 = -6 (wrong is the sign)

add: 6 + 10 = 16 add : -6 + 10 = 4

subtract: 8 - 16 = -8 subtract : is wrong

What am I doing wrong? add : 8 + 4 = 12 correct answer

add: 6 + 10 = 16 add : -6 + 10 = 4

subtract: 8 - 16 = -8 subtract : is wrong

What am I doing wrong? add : 8 + 4 = 12 correct answer

Hope this helps.

Raul.

Alex,

You should not be subtracting the 10!

Once you solve the 2*3 = 6 which should be your first operation you are left with 8 - 6 + 10

This is not the same as 8 - (6 + 10) which is the operation you are performing.

Simply subtract 6 from 8 then add 10: 8 - 6 + 10 = 2 + 10 = 12

April G. answered • 09/11/14

Tutor

5.0
(55)
Math tutor

1) 8 - 2 * 3 + 10

2) 8 - 6 + 10

3) 2 + 10

4) 12

What happened in your example is that when you went from step 2 to step 3, you actually performed 8 - (6+10), but in the problem you are only supposed to subtract the 6 since there are no parenthesis.

Hope this helps!

Phillip R. answered • 09/11/14

Tutor

New to Wyzant
Top Notch Math and Science Tutoring from Brown Univ Grad

when you have two operations that have the same preference level, you do them from left to right, same direction that we read

so when you get 8 - 6 + 10 you should do 8 -6 first, then add 10 last

Ask a question for free

Get a free answer to a quick problem.

Most questions answered within 4 hours.

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.