- how would i work out this problem?

Question

-5 + -4=

Answer 1

Think of a number line. Start with -5 and then go back 4 more places.

Two negatives added together equal a negative.

Answer 2

http://www.dositey.com/addsub/negnum.htm

http://www.eduplace.com/math/mathsteps/6/b/index.html

Answer 3

if you know the rule stay change opposite.
it might just give you a clue.

-5+-4=
two negatives added together equal a negative.