Add and Subtract Positive and Negative Numbers

[mathnerdist]

thanks



[heartbea1]

sorry if i sound like an idiot (just grade 6)

if its +72  its just like 72 right??

[1994neha1]

@heartbea1 yes

[sz42781]

why are we adding subtraction problems? FML

[zaydeeable]

ur one of the best tutor i have ever seen thank you so much just a quick question lets us say if it was like the is 5++4, i belive you dont have to change the signs righta..?

and uno for this question: diver dives to a depth of -27 meters. a second diver dives to a depth of -16 meters. what is the difference in the depth of the divers. i got 43 but its meant to be 11 hows that possible.

[lolzchingway101]

Thanks so much! This helped!

[Heartlikearock87]

thanks for confusing me even more

[BANANAx911]

So signs same you add? And signs different subtract?

[KingBeltranVII]

thank you.i have to take my eoc tomarrow so i really needed to know this in case i cant use a calculator.

[YourTutorOnline]

@KingBeltranVII Glad it was help. What's "eoc?" Some sort of standard test? They seem to be a bit different all over the country.

[CrazyCraftsbyKiara]

Thank you, thank you, thank you. This helped so much!!! Now all I have to do is find my pencil, lol

[FullmetalStephen]

thank you, this really helped. keep up the videos

[coolo18c]

my friend made a huge number line goes from -2000 to +2000

[TheHotFuzz911]

answer than is +10

[flipalchemy10]

PLEASE HELP I HAVE THE WORST ALGEBRA TEACHER EVER! heres my question how would you solve this problem:

1/9+(-5/6) how would you solve that (the numbers in parenthesis is what you need the absolute value of. and i cant use a calculator. please help me*

[jomarixplode]

Hey! Thanks for the vid. helped alot

i wish i could donate but im 13. But this vid was worth a buck

[melilycui]

thanks for the video ^^

and what if it's like -4 - -14? O.o

XP



[MrSaskar]

@melilycui its 10

[shanadono]

I came up with another method too, other than the numberline. It uses a bendable numberline, essentially letting students use absolute value. Youcan check out the video for my tool (The ZeroSum ruler) if yuo click my name. I'll also try to post a video response.

it makes me sick that kids are taught one way- with the rigid number line- to add positives to negatives. It completely goes against the way we'd do the math in our heads!

[iiMMrcalii]

omg this is so cool . i have the state test coming up soon i will be stalking and watching these videos 24/7

[MegaElijah]

what if it 2-3*-5+4+ what

[PUNCHBOXX]

The best video so Far, Rck on dude, you just help one fellow,

[wangja213]

thnx that helped me alot of but 1 more question pretend the question is -16 - 7 if htey switch are they the same answer

[yamahabibi]

thank you very much .

very well explained . i had huge problem with negative number but with ur lovely video i sloved for ever .

thank you and pls upload more video .

all the best

[wangja213]

what if its like this +7- -3

[YourTutorOnline]

turn the double negative into just one sign. - - becomes a positive so the new problem is +7+3 = +10.

If there is ever 2 signs right next to each other, change them into one:

- - becomes +

+ - becomes -

- + becomes -

+ + becomes +

[Sakeyha]

ok, I looked at the whole video , i jumped to conclusions. sorry, and thanks!!!

[jonaee2009]

thank you i got caught cheating on a test

[YourTutorOnline]

Oh no, don't cheat! Now you won't have to...right?

[Sakeyha]

What if you dont have time to do number lines?? is there a quicker way??

[mrstracyb]

Thank You!!!!

[babyboipushat15]

than you for the video .......... might have saved my college education

[SystemXpander]

hi. what if you have addition and subtraction in the same problem..say with 3 intergers like: -2 + 7 - 8 = ? What is the rule for solving this?

[YourTutorOnline]

Follow your order of operations (PEMDAS). When you have two operations that can happen at the same time, do them in order from left to right.

So first do -2 + 7 which is +5. Now take that answer and do +5 -8 which is -3.

Hope that helps.