Posted by Samantha on Monday, April 6, 2009 at 7:46pm.
draw a number line with zero in the middle.
now look at negative(left) + negative(more left) --> more negative
-1 + (-1) = -1-1 = -2
now look at positive + positive
1+1= 2 but you know that
now look at negative + positive
left then right
-1 + 1 = 0
similarly positive + negative
right then left
+1 + (-1) = 1-1 = 0
see we done that and i get it but im still a bit confused try giving me a problem and i will figure it out.
5 + (-3)
from zero right 5
then left three
-2 - (+8)
from zero left 2
then left 8 more
You can do it if you stick to the number line. Using parentheses like I did might make it clearer (or not).
-2 + (-5) + 3 - 2
-2-5 = -7
-7+3 = -4
-4-2 = -6 answer
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