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Lesson 3: Adding & subtracting with negatives on the number line

# 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
(1 vote)
• 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.
• Is this what old Khan Academy looked like
(I know that this has nothing to do with the topic but I'm not a KA veteran. I recieved the badge for 2 years a few months ago)
• Probably. I saw a comment from 8 years ago
• TBH i find this school fun
• I don't get these graphs. Can someone help me?
• If you noticed this teacher/tutor solved these sums using two different things/strategies .
Step 1 : He explained each and every number line given and created an expression.
Step 2 : He eliminated the options he didn't feel were right and explained why.
• 2 negatives = a Positive