Posted by Samantha on Monday, April 6, 2009 at 7:46pm.
Could someone please explain to me how you get answers when you add a negative number to a negative number or a positive number to a positive number or a negative and positive number added together, because my teacher tried explaining it to me, but I'm completly lost. The ones I don't understand the most are like, for example, 5 + 3 or 2  +8 and I wouldn't know how to answer that.
If you could help that would be nice, THANKS!!!

Math  Damon, Monday, April 6, 2009 at 7:53pm
draw a number line with zero in the middle.
now look at negative(left) + negative(more left) > more negative
1 + (1) = 11 = 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) = 11 = 0

Math  Samantha, Monday, April 6, 2009 at 7:55pm
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.

Math  Damon, Monday, April 6, 2009 at 7:55pm
5 + (3)
from zero right 5
then left three
= 2
2  (+8)
from zero left 2
then left 8 more
10

Math  Damon, Monday, April 6, 2009 at 7:57pm
You can do it if you stick to the number line. Using parentheses like I did might make it clearer (or not).

Math  Damon, Monday, April 6, 2009 at 7:58pm
try
2 + (5) + 3  2

Math  Samantha, Monday, April 6, 2009 at 7:59pm
k thanks

Math  Damon, Monday, April 6, 2009 at 8:01pm
25 = 7
7+3 = 4
42 = 6 answer
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