Learn how to add and subtract negative numbers. The problems solved in this video are 2 – 3 = -1 and -2 – 3 = -5 and -2 + 3 = 1 and 2 – (-3) = 5 and -2 – (-3).

Practice this lesson yourself on KhanAcademy.org right now:

Watch the next lesson:

Missed the previous lesson?

Pre-Algebra on Khan Academy: No way, this isn’t your run of the mill arithmetic. This is Pre-algebra. You’re about to play with the professionals. Think of pre-algebra as a runway. You’re the airplane and algebra is your sunny vacation destination. Without the runway you’re not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We’re about to take off!

About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Pre-Algebra channel::

Subscribe to KhanAcademy:

This sucks

can you explain the rules of multiplying and dividing integers?

Why on earth have you come up with this way of doing math when the old way has been fine for over 200 years.

I think this is totally UNACCEPTABLE.

How in the world do you figure Two negatives make a positve. Oh let me see them one sideways and put them together and now you have a positive. And when In life WILL anyone ever have to use this way of math? This is what they call common core?

It is ridiculous. It is so confusing. No wonder KIDS are failing. It’s pathetic.

😄😄😄

Thank you it work a lot because I need it more review

Thanks man I am in year 6 I have a test tomorrow this helped

thanks for that

All my math teacher does is talk about his life and how is such a ” great” teacher when he is like 78 years old

what app are you using?

wich grade math is this in America

the number line strategy is so much easier 😊😊😊✌

Thank you so much. This was so confusing!

dont like it

It was a very helpful video and I cleared out all my doubts. Thank you Salman Khan!!!

I’m only here because I failed a quiz on this….

how is he writing so good on a computer XD did anyone else notice that O_O

why the hell does two negatives equal a positive???