Subtraction is like saying "not" when speaking. "I am not going to the movie" means that you will not go to the movie. "I am not not going to the movie" means that you will go to the movie. In language and in math, double-negative cancel out. If I "take away" negative 5 dollars from you, I am giving you $5.
I remember the day my teacher told me to go and watch this video 12 years ago. I had a C- on the assignment though. Cant believe how time flies on. I was just browsing online when I saw this video. It brings so much memories. Today I have my degree in software development. Thank you KHAN ACADEMY.
I am a College Freshman, and I'm on Christmas Break. With so much free time, I literally have played video games so much, that I have decided to do something else for about 2 hours a day. For the next 3 weeks, I'm going to watch ALL Khan Academy videos, from Pre-Algebra, to Algebra 2, then freshen up on Trig, and Pre-Cal. I want to go ALL the way back to the start, so I can try and mop up some of the stuff I forgot.
I reccomend doing the Khan academy modules. They're alright but nothing beats a one on one tutor session with someone who has patience majored in Mathematics.
Oh my teacher fully explained it and I’m the only person who doesn’t get it and we’ve moved on from the lesson and I failed the test... like by a lot...
Ugh, same. Tbh It's VERY annoying. He barely teaches it and expects you to understand everything. Only gives you a few days to learn it, then quiz you when you're clueless!
My mom constantly tells me that math has changed SO much the past years. It has been 14 years and this is what we’re learning. I don’t know how drastically they changed it, but she was born in the 1986. So she was my age in 1998. That’s 8 years before this video was made. So I guess almost a whole decade before this was when she was doing this kind of math. This is just proof that our education system is super wonky. The new techniques we’re taught are (in my opinion) so much harder then the strategies my mom taught me. She stopped teaching me tho. However she taught me how to add 3-4 digit numbers so thanks lol.
The important point is to start off by plotting everything on the line. If you are adding you go to the right if you are subtracting you go to the left. The only exception is when 2 minus signs are right next to each other. In that situation you replace the 2 minus signs with a plus sign. Which means you go to the right (adding).
THANK YOU SO MUCH THIS HELPED ME ALOT EVEN THOUGH I WAS ABSENT FROM SCHOOL FOR FIVE DAYS! This was posted 13 years ago and I wasnt even BORN that time but it still helps! Once again, THANK YOU
i have to say thank you a million times over. i never understood negatives and it was frustrating me to tears, literally! but that number line with the examples really helped me understand it in a way i was unable to before. thank you so much!
I really try to understand this stuff when I read it from the books, but that never works, but the way you put it makes it so much more simple. Please keep putting out videos they really work.
hey man you are incredible! I have my end of year exams on Monday and there really important coz next year I decide what Im taking for G.C.S.E.! oooo scary! But you have helped me more than my teacher at school! I will let you know how I get on in the exams. KEEP DOING WHAT YOU DO BEST! ( MATHSSS!)
oh GOD this is good ! the best i tell u ! thx ! and im in 7th too and i always hv to look in my txt book again to do my problems --not anymooooorreee !!! :-)
@alternit Yes, the negatives cancel out an turn positive. SO - 5 - - 7 = 5 + + 7 = 12. On number line it would you would start at 5, go to the right 7 times.
hmm.......i had to play the vid over a few times becuz i wasn't paying attention(to busy peeling skin) but u explained it better than my teacher! i might get a A+ tomorrow(also a lollipop! ^-^)
Thanks a lot for these videos,it is explained in bery easy method,my teachers explain me and it goes above my head and this goes straight in my head,thanks
When ur adding or subtracting numbers a easy way to do it is to cover up the signs for a second, take the bigger number minus the smaller number, and then use the sign of the bigger number. For example: -5 + 8 =__. 8-5= 3. The bigger number is positive therefore -5 + 8 = 3. This also works when subtracting (unless the sign is the same)
Sorry about not writing any text in my comment! Your video is great. As a math teacher, the biggest ptoblem my kids stil have is with negative numbers. Try solving for y in "y + 22x = 5x - 7" if you don't know what "5 - 22" is! I developed the tool I posted (the ZeroSum ruler) to help my students. I was hoping you may check it out. We'll get kids over this hurdle!
@96arun ....children need to understand "why" something works. Simply having them memorize a rule is not helping them, because they will forget the rule eventually. The number line is a great tool because it teaches the concept. Once kids grasp the concept, they won't need to use the number line anymore.
@HumanTargetAus Here in America, the grading scale is 1-4, where each one is basically 25%, so 3.8 * 25% is a 95%-96% average. I think my average is so high because some of the general required classes (like history, literature, etc) are curved by the instructors for non-majors (there are three types of classes: classes for majors in that subject, classes for non-majors, and classes advanced enough that you must be a major in that subject), and so my curved grade always had me above a 100%.
I'm currently a sophomore in highschool and I'm on winter break, so I've decided to take it upon myself to work on my basics again! Hopefully I'll be able to get my grade in maths up again lol
I want 2 know how the process can be done entirely using the numberline minusTHErules I had notice when I subtract integers I first find the minuend in the numberline and then I count backwards using the subtrahend to get the answer. But how about in the case of subtracting a positive with a negative like for example: 5 - (-3), the accepted answer is +8.so the answer is like adding the operands? I had always thought that when U subtract U move backwards by the number subtrahend. So how's that?
@Lazerwolf27 That may be true, but I'll offer a counterexample. You can be 5 degrees below zero, and when you go down 5 degrees, you are now at 10 degrees below zero. The math here is: -5 - 5 = -10. Negative numbers can be real.
@HumanTargetAus Yep, I am a second year Math and Computer Science major with a 3.8 GPA. I should be 21 with two Master's degrees, because I started college when I was 16.
Ok, I am confused when you say MINUS vs negative because I am thinking that MINUS means what application we are to do. Like, neg 3 minus 3. If you say 3 minus neg 3, then say that those are both SAME SIGNS to be canceled out, then apparently the 3’s are being added to equal 6. Should it have been written -3 MINUS -3= ? Or the way you had it? 3 Minus -3=? Sorry if this is a stupid question cuz I suck at math so...
Subtraction is like saying "not" when speaking. "I am not going to the movie" means that you will not go to the movie.
"I am not not going to the movie" means that you will go to the movie.
In language and in math, double-negative cancel out. If I "take away" negative 5 dollars from you, I am giving you $5.
Khan Academy thanks
Lit 🔥
Good Students👩🎓
YOUR SUCH I GREAT TEACHER OMG YOUR GOOD your a life saver
I am intersted
I remember the day my teacher told me to go and watch this video 12 years ago. I had a C- on the assignment though. Cant believe how time flies on. I was just browsing online when I saw this video. It brings so much memories. Today I have my degree in software development. Thank you KHAN ACADEMY.
Congrats
15 years ago .......
Khan academy literally is the reason I do well in math!
Khan academy literally is the reason I want to kill myself
Same
@@runnybabbit5520 frr
@@runnybabbit5520 buddy same
@@runnybabbit5520 and still ur watching it?
I am a College Freshman, and I'm on Christmas Break. With so much free time, I literally have played video games so much, that I have decided to do something else for about 2 hours a day. For the next 3 weeks, I'm going to watch ALL Khan Academy videos, from Pre-Algebra, to Algebra 2, then freshen up on Trig, and Pre-Cal. I want to go ALL the way back to the start, so I can try and mop up some of the stuff I forgot.
How'd it go? Did you review all your fundamentals?
👏🤔✌
Congrats you graduated college I think
Go get married
this is what you call productive? why dont you create something? write a book. paint a picture. dont just consume more media.
good luck bro
This mans back must hurt after carrying all our math grades
WOW! I learned so much! I also learned this video has negative 30 pixels!
It was made 10 years before you commented...
@Anannya wanna find out
jk
lol
( -'_-')
this has improved my sons math grade thanks man
I reccomend doing the Khan academy modules. They're alright but nothing beats a one on one tutor session with someone who has patience majored in Mathematics.
Finally *Sigh* my maths teacher explains it poorly, in fact he doesn't explain it at all and just puts it on the test... I still passed though :)
same
My teacher helps but last year my teacher didn't help she had favorites tho
Oh my teacher fully explained it and I’m the only person who doesn’t get it and we’ve moved on from the lesson and I failed the test... like by a lot...
Ugh, same. Tbh It's VERY annoying. He barely teaches it and expects you to understand everything. Only gives you a few days to learn it, then quiz you when you're clueless!
same bro...
I'm never going to be friends with math
pretty healia rly??????
ikr
Math will fail you then
Me too
Same
OMG Thx i've been looking all around youtube and u gave a perfect presentation!! I am year 7 and having a hard time with maths
No year 11 now, junior year
this was like 500 years ago but it still helps me
Lol cuz math don't change
You so rude brrr
Shut up you piggy
man shout out to the goat for helping me through middle school this man deserves a medel
I agree
My mom constantly tells me that math has changed SO much the past years. It has been 14 years and this is what we’re learning. I don’t know how drastically they changed it, but she was born in the 1986. So she was my age in 1998. That’s 8 years before this video was made. So I guess almost a whole decade before this was when she was doing this kind of math. This is just proof that our education system is super wonky. The new techniques we’re taught are (in my opinion) so much harder then the strategies my mom taught me. She stopped teaching me tho. However she taught me how to add 3-4 digit numbers so thanks lol.
My mom is born in 1986 too lol in july
@@avacadhoe1851 thats cool!!!
Mothers lie all the time...
My level of understanding is equal to scientists relationship with the unknown
The important point is to start off by plotting everything on the line. If you are adding you go to the right if you are subtracting you go to the left.
The only exception is when 2 minus signs are right next to each other. In that situation you replace the 2 minus signs with a plus sign. Which means you go to the right (adding).
THANK YOU SO MUCH THIS HELPED ME ALOT EVEN THOUGH I WAS ABSENT FROM SCHOOL FOR FIVE DAYS! This was posted 13 years ago and I wasnt even BORN that time but it still helps! Once again, THANK YOU
Dude you can calm down sheesh
omG I HAVE A TEST TOMOROW
AND U HELPED ME UDERSTEAND THIS !!
THANK U
DANKE SHUN
GRACIA
GRAZIE
David Simon not anymore
Im in 7th grade and im watching this for our periodical test that will be held tomorrow and this video helps me a lot.. thanks!
AvMel RilYn10 I've got a huge test to the vidio also helped me I'm a strait A student I'm also in grade 7 and the vidio helped me
I am a student of a class 7 . My book is N. C. E. R. T. So thank you for solve my concept. Integers
My life just got better thank you!! I needed this for a huge test
Yooo i was looking for a video like this and i ended up on this 11 yr-old video
Sameeeeeee
@@ikkid6482 you all are wrong not same because the comment says 11 years ago and when you are writing it was 12 years for you
i have to say thank you a million times over. i never understood negatives and it was frustrating me to tears, literally! but that number line with the examples really helped me understand it in a way i was unable to before. thank you so much!
This clip's so old dang, kudos to the guy
I hate how you forget basic arithmetic just a year or so out of school. Going back to college with a 6 year gap is suffering.
I know exactly how you're feeling is been 7 for me and I was never good at math in the first place!
I really try to understand this stuff when I read it from the books, but that never works, but the way you put it makes it so much more simple. Please keep putting out videos they really work.
11 years later and this still helps me. Thank you!
Clearly, has alot of time on his hands. But, we are so greatful for all your hard work helping us to become smarter in math...
My teacher just made me do this, I’m good at most maths, but it helped. I also found out that this video has minus thirty pixels
This helps a lot
I’m glad I found this
9+10 = 19! Genius!!
+Kamal Dev Yogi yes :Dhow about -9-10?
+xDragonsFTW - that equals - 19
Mister Minitry :D lol
+Kamal Dev Yogi no 9+10= 21!
well then what is
10+(-9)=?
Now i can finish my tests on khan academy :>
hey man you are incredible! I have my end of year exams on Monday and there really important coz next year I decide what Im taking for G.C.S.E.! oooo scary! But you have helped me more than my teacher at school! I will let you know how I get on in the exams.
KEEP DOING WHAT YOU DO BEST! ( MATHSSS!)
oh GOD this is good ! the best i tell u ! thx ! and im in 7th too and i always hv to look in my txt book again to do my problems --not anymooooorreee !!! :-)
i am so lost ...waiit i get it now ......hold try to copy this down.....got it wow you made my life better thank you so much
What I learned in this video: Two minus signs equal a positive and thus one should add. I'm learning algebra. :3
Yes, but the signal remains ... If negative sign, keep the sign after addition of equal signs
yea me too, I'm in 7th grade now
I wish I was in algebra 1. But instead I was placed in advanced mathematics 2 (I'm in 7th grade)
same
me too
lol im was freaking 5 when they posted this
U sound 5😁
i was 2
ianah kristine I was 3
ianah kristine I was 2
i was 2 :D
@alternit Yes, the negatives cancel out an turn positive. SO - 5 - - 7 = 5 + + 7 = 12. On number line it would you would start at 5, go to the right 7 times.
Thanks really helped me in math I passed my test
Awesome video. Great video really helped me man😊👍
Thank You!
I'm currently studying for a pre algebra test and this helped so much. thank you!
hmm.......i had to play the vid over a few times becuz i wasn't paying attention(to busy peeling skin) but u explained it better than my teacher! i might get a A+ tomorrow(also a lollipop! ^-^)
The power of repetition
Thanks u help me a lot,I was bad at it I even fail my maths test thanks to u I became better!
NumberLine is great!
Thx I really needed the help u keep doing what you do best just wanted to say thx bro
Sir Salman Khan, bless you forever and you are a life saver... Thanks.
Thanks a lot for these videos,it is explained in bery easy method,my teachers explain me and it goes above my head and this goes straight in my head,thanks
Maths Antics is excellent. Basic rules : two negative s make a positive, and a negative and a positive makes a negative.
When ur adding or subtracting numbers a easy way to do it is to cover up the signs for a second, take the bigger number minus the smaller number, and then use the sign of the bigger number. For example: -5 + 8 =__. 8-5= 3. The bigger number is positive therefore -5 + 8 = 3. This also works when subtracting (unless the sign is the same)
A good teacher 😀
this guy is so helpful imaen like he just basicly just did my homework for me
how hard it was to teach on pc back then.... you came long khan academy... and your organization did well
thank you i am learning this in 5th grade
hey guys you should use kfc for subtracting negative and positive look
K- keep
F-flip
C-change
k and c is the same thing but it helps u remember more
sayeda munira I call it "KCC" Keep change change. Interesting it is also called a flip though.
I thought it was kcf keep change flip
It's rlly hard to concentrate when u think about KENTUCKY FRIED CHICKEN and u turn it into a math acronym
sayeda munira isn't keep change flip? Ur probs thinking about kfc lolol
ThAnKs fOr tHiS tUtOrIaL
This video was grate after i Finished i understood this concept perfectly.
great video & great explanation. made things very clear, thanks :)
Thank you, now i can do my math test
thank u khanacademy my son is doing great in school cause of u he said thanks
This is the only video that made the most sense
Thank you. Great voice!❤
this is so old, but better.
:)
Anyone in 2019?
How abt 2020
2021
@@lil_zikafizz7549 2024
Great videos my boys learn alot from it. Totally not confussing.
Sorry about not writing any text in my comment! Your video is great. As a math teacher, the biggest ptoblem my kids stil have is with negative numbers. Try solving for y in "y + 22x = 5x - 7" if you don't know what "5 - 22" is! I developed the tool I posted (the ZeroSum ruler) to help my students. I was hoping you may check it out. We'll get kids over this hurdle!
thx a lot this is amazing!!!! it just cant get any simpler! i have found the answer to my math help ! awesome!!!!!!!1
That is very true
boy am i happy that kahn academy got new programs
@96arun ....children need to understand "why" something works. Simply having them memorize a rule is not helping them, because they will forget the rule eventually. The number line is a great tool because it teaches the concept. Once kids grasp the concept, they won't need to use the number line anymore.
Thanks it really helped!!! I've missed a lot of days of school and I was so lost yesterday! XD I totally get it now thanks!!!
just curios on your channel do you do C++ tutoring cause i'm really confused.
this really helps thank you !
I needed a video to help me KHAN ACADEMY YOU ARE THE REASON I HAVE A GOOD MATH GRADE
Helped my daughter while we were on vacation. Thank you!
Whoa 2006!? Geez good old days
@HumanTargetAus Here in America, the grading scale is 1-4, where each one is basically 25%, so 3.8 * 25% is a 95%-96% average. I think my average is so high because some of the general required classes (like history, literature, etc) are curved by the instructors for non-majors (there are three types of classes: classes for majors in that subject, classes for non-majors, and classes advanced enough that you must be a major in that subject), and so my curved grade always had me above a 100%.
I'm currently a sophomore in highschool and I'm on winter break, so I've decided to take it upon myself to work on my basics again! Hopefully I'll be able to get my grade in maths up again lol
These videos are amazing. You did a great job!
Thnx for helping me I understand it now
OMFGGFGGGG I LOVEE UUUUUUU legit im soobadd a mathss thas its difficult for Me who ever teaches!M i GOT THISSSSSS XXX
Thank you with the number line it helped me get my homework done. Thank You!!!
THANKS SO MUCH U HELPED ME ON MY HOMEWORK
This help me with my math so much thanks dude!!
OMG! This helped moi alot! thnxs Sal!
Your Smart Thanks This Helped!!!!!!! Great Jobb :))
wow bro you a legend
Very true
I love this guys intro.
I want 2 know how the process can be done entirely using the numberline minusTHErules I had notice when I subtract integers I first find the minuend in the numberline and then I count backwards using the subtrahend to get the answer. But how about in the case of subtracting a positive with a negative like for example: 5 - (-3), the accepted answer is +8.so the answer is like adding the operands? I had always thought that when U subtract U move backwards by the number subtrahend. So how's that?
always start with positive no. written in the begining ❤️❤️😘
@Lazerwolf27 That may be true, but I'll offer a counterexample. You can be 5 degrees below zero, and when you go down 5 degrees, you are now at 10 degrees below zero. The math here is: -5 - 5 = -10. Negative numbers can be real.
@HumanTargetAus Yep, I am a second year Math and Computer Science major with a 3.8 GPA. I should be 21 with two Master's degrees, because I started college when I was 16.
Your voice go's so good with kareoke.
This is older than me but this is really easy to follow. Thanks!
THANK YOU SO MUCH. im doing this in grade 9 and you saved my life
Liam O oop, what grade are u in now? IM pretty sure you’re either in universtity or ur working, cool
Thank you! I finally got past the part in my hw I was stuck on!!
Finally, I learned how to add and sub negative numbers. Thank you!
This really helped me to make the click. Thanks 🤓
Thank you for this I think I’m starting to get the hang of this!
THanks man ! i completly understand it now
Thank you for teaching me!
I learned a lot from this video
Ok, I am confused when you say MINUS vs negative because I am thinking that MINUS means what application we are to do. Like, neg 3 minus 3. If you say 3 minus neg 3, then say that those are both SAME SIGNS to be canceled out, then apparently the 3’s are being added to equal 6. Should it have been written -3 MINUS -3= ? Or the way you had it? 3 Minus -3=? Sorry if this is a stupid question cuz I suck at math so...