If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

## Arithmetic

### Course: Arithmetic>Unit 18

Lesson 5: Intro to adding negative numbers

# Adding numbers with different signs

Use a number line to add 15 + (-46) + 29. Created by Sal Khan and Monterey Institute for Technology and Education.

## Want to join the conversation?

• is a + times a + a negative •   (Positive) x (Positive) = (Positive)
(Negative) x (Negative) = (Positive)
(Negative) x (Positive) = (Negative)
I hope that's clear.
• (Positive) x (Positive) = (Positive)
(Negative) x (Negative) = (Positive)
(Negative) x (Positive) = (Negative)
if u like my suggestion pls upvote • Hi,
I am Abia and I want to ask a question of my rs aggarwal book of class 6 Ex-4B question no. 4 iii
I did it like this: 312-103=209
but now also I have little bit confusion.
Bye. • For the 15-46, can you do 46-15 and make it negative?  • Maybe it might help if you drew out a number line for basic examples! If you are using a number line to help you, when you see a negative sign for a number, that means you are going back the same number of hops that the number is on the number line. You do the reverse for a positive number. I'm also going to go through another example. If you had the problem -91+93, here is how you would solve it. On a number line, 91 is 91 hops to the left of 0. 93 hops is 93 hops to the right of zero. When adding negative and positive numbers, you always want to stay close to the number 0. The difference between the numbers 91 and 93 is two. When you add +93 to -91, you can easily get to 0 by changing the 93 to a 91. -91+91 is 0. To get back to 93 from 91, you have 2 left over. You are allready at 0 from your fake number line. 0+2=2, so -91+93=2.
Hope this helps 245138!
• I don't get negative and positive I need more clarification. • So you subtract when it says to add a negative • ⢀⣤⠖⠒⠒⠒⢒⡒⠒⠒⠒⠒⠒⠲⠦⠤⢤⣤⣄⣀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⣠⠟⠀⢀⠠⣐⢭⡐⠂⠬⠭⡁⠐⠒⠀⠀⣀⣒⣒⠐⠈⠙⢦⣄⠀⠀
⠀⠀⠀⣰⠏⠀⠐⠡⠪⠂⣁⣀⣀⣀⡀⠰⠀⠀⠀⢨⠂⠀⠀⠈⢢⠀⠀⢹⠀⠀
⠀⣠⣾⠿⠤⣤⡀⠤⡢⡾⠿⠿⠿⣬⣉⣷⠀⠀⢀⣨⣶⣾⡿⠿⠆⠤⠤⠌⡳⣄
⣰⢫⢁⡾⠋⢹⡙⠓⠦⠤⠴⠛⠀⠀⠈⠁⠀⠀⠀⢹⡀⠀⢠⣄⣤⢶⠲⠍⡎⣾
⢿⠸⠸⡇⠶⢿⡙⠳⢦⣄⣀⠐⠒⠚⣞⢛⣀⡀⠀⠀⢹⣶⢄⡀⠀⣸⡄⠠⣃⣿
⠈⢷⣕⠋⠀⠘⢿⡶⣤⣧⡉⠙⠓⣶⠿⣬⣀⣀⣐⡶⠋⣀⣀⣬⢾⢻⣿⠀⣼⠃
⠀⠀⠙⣦⠀⠀⠈⠳⣄⡟⠛⠿⣶⣯⣤⣀⣀⣏⣉⣙⣏⣉⣸⣧⣼⣾⣿⠀⡇⠀
⠀⠀⠀⠘⢧⡀⠀⠀⠈⠳⣄⡀⣸⠃⠉⠙⢻⠻⠿⢿⡿⢿⡿⢿⢿⣿⡟⠀⣧⠀
⠀⠀⠀⠀⠀⠙⢦⣐⠤⣒⠄⣉⠓⠶⠤⣤⣼⣀⣀⣼⣀⣼⣥⠿⠾⠛⠁⠀⢿⠀
⠀⠀⠀⠀⠀⠀⠀⠈⠙⠦⣭⣐⠉⠴⢂⡤⠀⠐⠀⠒⠒⢀⡀⠀⠄⠁⡠⠀⢸⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠙⠲⢤⣀⣀⠉⠁⠀⠀⠀⠒⠒⠒⠉⠀⢀⡾⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠉⠛⠲⠦⠤⠤⠤⠤⠴⠞⠋1   