math
posted by mary .
 how would i work out this problem?
5 + 4=

Think of a number line. Start with 5 and then go back 4 more places.
Two negatives added together equal a negative. 
http://www.dositey.com/addsub/negnum.htm
http://www.eduplace.com/math/mathsteps/6/b/index.html 
if you know the rule stay change opposite.
it might just give you a clue.
5+4=
two negatives added together equal a negative.
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