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### Course: 6th grade (Illustrative Mathematics)>Unit 7

Lesson 8: Extra practice: Negative numbers

# Number opposites challenge problems

Sal solves a few challenging problems with number opposites on the number line.

## Want to join the conversation?

• Why is the opposite of 0 still 0?
• That's because the opposites of the number is the negative number of that number. but 0 is neither positive nor negative. so the opposite of 0 is 0.
• Can you have another vedio of this but explain more clearly?
• well it means if you have a number line will a -4,-3,-2,-1,0,1,2,3,4 then the question stats that what is the opposite of -3. you need to simply take away the negative sign or add the negative sign if there was not a a negative sign to begin with.
• how does this make sense
• i don't know
• khan academy has helped me to excell in math.after using khan academy for about a week or two i became a honor student.either way math has always been my favorite subject but with khan academy im taking high school math when im in the 6th grade
• I also love math and I’m in g5 and does 11/12 grade math
• i dont understand how b = -d when d is on the right which is positive not negative
• and stuff this isn't it but still
• This got confusing when sal said “B is negative of D”.
• Im very thankfully for you khanacademy, when i was in elementary i was not listening to my subject and i dont know how catch up to that lesson but now i'd try this site it refresh my brain to know hpw it those to solve an arithmetic and any problem i hope it will help me more better now, soon to be an electrical engineer.