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# Interpreting numeric expressions example

Sal chooses the correct interpretation of the integer expression 3 + (-7).

## Want to join the conversation?

• how do you become a big brain
• The secrets of the big brain are hidden from our dimension, very rarely a human being stumbles into Big Brain dimension and becomes a big brain, when they re-enter our dimension they share their big brain thoughts and other humans understand some of the thoughts.
• 1+9 what does it mean then
• all you have to do for 1+9 is addition. put up 9 fingers, then bring up 1 more finger that is 10. you dont even need a number line, if you wanted to use a number line then it would be 1 to the right of zero and then 9 to the right of 1. i'm sorry i'm late just trying to help.
• i have no idea what he just explained and i actully was paying attention
• Go through the video slowly also replay it until it makes sense
• can I have 10 upvotes pls I really want moon badge.
• who supports pride
• I'm straight but I support
• Today is Friday, March 24, 2017. It is pm..Sorry to bother you, why are there parenthesis around the -7? Instead 3+ -7. Please, explain! Thank you very much.
• Sometimes mathematicians just like to keep their work organized. It gets a little messy if you write 3+-7. On a test, you might mistake the signs for something else, so you should put parentheses to help yourself. The parentheses just serve as basically a way to keep your equations organized.
• can I pls get 10 points I want moon badge
• So the zero counts in here?
• Not sure what you mean by "counts," but it is the number between positive and negative numbers. If you are trying to find distance between a positive and negative number, then 0 counts as one of the spaces.