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### Course: Class 6 (Old)>Unit 4

Lesson 3: Adding and subtracting integers

# Adding & subtracting negative numbers

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). Created by Sal Khan.

## Want to join the conversation?

• Does Anyone Know What -5-(-6) Is??
• yes i do it is 1
• so the bigger number represents whether its positive or negative
• Depends...
You can word it like this
The number farther to the left of the number line is negative
-5,-6,-7,-8,-9.....
The number farther to the right will be positive
1,2,3,4,5,6,7,8...
The number line is technically separated in two parts , negative/positive and in the middle is 0.

You can also think it this way...
Left of 0 on number line = negative
Right of 0 on number line = positive
Hope this helps!
• Is there any easy ways to do this mentally? On tests I don't have paper or paper space to draw a number line
• When you subtract a negative number, it is the same as adding a positive number. When you add a negative number, it is the same thing as subtracting a positive number. For example, -1 + 2- -3 + -8 - -12= 8
• Okay, so here he showed that -2 + 3 = 1. What is it's something like -17 + 2? How will I know whether that's suppose to equal -15 or -19? Does it matter if the negative number is bigger than the positive one? Can someone please explain it to me?

Also, if the problem was written as 2 + (-17), would that change the out come of the answer?
• When adding -17 and 2, the negitive number supposedly goes down the number being added. So -17 plus 2 equals -15.
• doesn't a negative + a negative = a positive? Or am i wrong.
• This is incorrect. This is a common misunderstanding that students have. While it’s true that a negative times a negative is a positive, a negative plus a negative is actually a negative.

When adding signed numbers, it is useful to think of positive numbers as gains and negative numbers as losses. A loss plus a loss is a bigger loss.
• you know, this is easier than it looks, it is hard not to get fooled.
• then what is a positive number adding a negative number example: 3 + -4 =
• That equals -1 .3+-4 is the same as -4+3 it will equal the same thing :) I hope this helps and if you have anymore questions just ask.
• 😀😃😄😁😆😅😂🤣😭😉😗😙😚😘🥰😍🤩🥳🫠🙃🙂🥲🥹😊☺😌😏😴 Just found out that you can do emojis on here
• rolf
(1 vote)
• How come the theory in question 4 doesn't apply to the others?
(positive and negative = positive)
• Because each positive and negative number has to be the -same- number
-Talal nasif
• Will the example -2 -(-3) still apply to every question like it? Would -53 -(-21) go through the same process?