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.

### Course: Arithmetic>Unit 18

Lesson 5: Intro to adding negative numbers

# Adding negative numbers on the number line

Sal shows how to model 6 + (-2) using vertical number lines.

## Want to join the conversation?

• At -- Why does it ask `-2+(-7)` when you could do `-2-(7)`?
• It is working with negative numbers. This question is showing that adding a negative is the same as subtracting a positive. Either way of writing it is perfectly acceptable.
• so what happens if you get confused
• try looking at other articles
• i didn't thnk it would be this easy
• are they super easy to do
• yes.so easy
• How do you add the fraction parts
• You find a common denominator for the fractions if they don't already have one, then you add the numerators just like whole numbers.
• I do know that negative numbers have value but why are they considered less than zero?
• Think of the wording you hear, 10 degrees below zero, 30 feet below sea level, you owe 40,000 to the bank, BCE is before common era. These wordings imply less than 0, Clearly on a number line, they are further left than 0, further left is less than.
• It is actually easy to understand.
• 2 negatives = a Positive