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Bryan and Jeanette were playing integer card game like the one you played in class. They were practicing adding and subtracting integers.Jeanette had a score of -10.Bryan took away one of Jeanette's cards.He showed it to her.It was a -8 Jeanette recalculated her score to be -2,but Bryan disagreed.He said that her score should be -18 instead.Read their Conversation and answer the question below.
"No Jeanette,removing a negative card means the same thing as subtracting a positive.So negative 10 minus negative eight is negative eighteen"
"it does not!Removing a negative card is the same as adding positive card.My score will go up.Negative 10 minus negative 8 is negative 2."
Based on their disagreement,who,if anyone,is right? Explain.
ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Sagot :

ArchimedesElevenidn
Jeannette is correct in this situation. You cannot subtract a negative number from anything. If you ever end up having two negative signs in a row, you must revert them to a positive (add). In this case:
-10 - (-8)  =  -10 + 8
When adding a positive to a negative, you can use the commutative property to know that this is the same as simply subtracting 10 from the positive integer 8:
10 - 8 = -2
If you need further explanation, let me know.
Hope this helps!
~ArchimedesEleven 
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