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### Course: Arithmetic>Unit 18

Lesson 7: Intro to subtracting negative numbers

# 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
• No offense but I think I got way more confused.
• this topic is so interesting
• Im bored if you are bored comment on this comment :]
• what about when there is 2 negatives like -1+(-5)
• -1+(-5) is the same as -1-5, since -1+(-5)=-1(1+5) by the distributive property. And using the distributive property we have -1*6=-6. Or you could do -1-5=-6
• 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.