Question 206939: what does 1+1 mean on a number line?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! your number line has a center at 0.
going to the left you are subtracting numbers so your scale starts at 0 then goes to -1 then to -2 then to -3, etc.
going to the right you are adding numbers so your scale starts at 0 then goes to 1 then to 2 then to 3, etc.
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1 + 1 means you are at number 1 on the number line and then you go to the right one unit to end up at 2.
1 - 1 meanhs you are at number 1 on the number line and then you go to the left one unit to end up at 0.
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it's a way to visualize adding and subtracting.
adding a positive number is to the right.
subtracting a positive number is to the left.
adding a negative number is to the left (same as subtracting a positive number).
subtracting a negative number is to the right (same as adding a positive number).
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go to the following website and click on problem number 206939 to see what I mean.
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http://theo.x10hosting.com/
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if problem number 206939 is not there, wait one half hour and try again.
it will be there.
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