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Absolute value

CSmith

Member
Aug 22, 2012
41
These i have tried to complete .someone please chech and correct them for me lease and thanks. can u give me steps when dealing with each one.like what i should do to attem these


a)|-3-2|
=|-5|
=5

b)|-5|-|2|
=-(-5)-2

c)|7|+|-4|
=7+(-4)-7-4=3

d)|-11+1|
|-10|
=10

e)|6|-|-3|
=6-(-3)
6-3=3

f)|8|+|-9|
8+(-9)=8-9
=-1

g)(-5)|3-6|


h)|-6| |(-2)
6/2
=3

i)|-7|+|14|
|7|+|4|
=7+4=11

j)(4)|6-7)
(4)-1
4-1
=3

k)5/1 |-2|

5/2
=2.5


l)|-1|+|-9|

= -(-1)+-(-9)
=1+9
=10


m)|4- pie|
|4-3.14
=-.86


n)| squareroot of 2 - |1.5|


o) | squareroot of 3 -1.7|


p)|1/5-1/3|


=2
 

Jameson

Administrator
Staff member
Jan 26, 2012
4,043
a)|-3-2|
=|-5|
=5

CORRECT

b)|-5|-|2|
=-(-5)-2

|-5|=5 and |2|=2 so |-5|-|2|=5-2=3

c)|7|+|-4|
=7+(-4)-7-4=3

|7|=7 and |-4|=4 so |7|+|-4|=7+4=11

d)|-11+1|
|-10|
=10

CORRECT

e)|6|-|-3|
=6-(-3) (not correct, should be just 6-3 since |-3|=3 )
6-3=3 <-- CORRECT final answer

f)|8|+|-9| ( |8| = 8 and |-9| = 9 so |8|+|-9|=8+9=17 )
8+(-9)=8-9
=-1

g)(-5)|3-6|

|3-6|=|-3|=3 so what is the final answer from here?
Hi CSmith (Wave),

Welcome to MHB. I've quoted part of your post and left my comments. I hope that you'll be able to finish some others on your own with my help. If something is unclear please let me know and I'll try to explain it.

Jameson
 

CSmith

Member
Aug 22, 2012
41
my answer for the last one is (-5)|-3|
(-5)|3|
-5+3=-2

thanks sooooooo much i am going to go over this to see what i dont understand because i really need to past this math class.
 

Jameson

Administrator
Staff member
Jan 26, 2012
4,043
my answer for the last one is (-5)|-3|
(-5)|3|
-5+3=-2 <- Don't add, multiply

thanks sooooooo much i am going to go over this to see what i dont understand because i really need to past this math class.
Almost. You are correct that you get (-5)|3| but you don't need to add, you should multiply. When two numbers are written next to each other like that without any plus, minus, etc. then it's assumed you are meant to multiply. So for this one I get 15 as a final answer.

Keep working at them and don't be shy about posting back when you have made some progress. We want to help you learn how to do them for yourself so you can pass your math class! ;)
 

CSmith

Member
Aug 22, 2012
41
ok for the last one why wouldnt it be -15?
 

Jameson

Administrator
Staff member
Jan 26, 2012
4,043
ok for the last one why wouldnt it be -15?
Ooops! I forgot about the minus sign. You're absolutely right, it is -15. :) Everyone makes mistakes.
 

CSmith

Member
Aug 22, 2012
41
lol yes yes .thanks again.i understand these practice questions .