Posted by cassandra on Monday, May 2, 2011 at 4:56pm.
7 minus 15 equals? would that be a 8?

math  Ms. Sue, Monday, May 2, 2011 at 4:58pm
Is it?
7  (15)?
or
7  15?

math  cassandra, Monday, May 2, 2011 at 4:59pm
7  (15) equals?

math  Ms. Sue, Monday, May 2, 2011 at 5:08pm
When adding and subtracting negative numbers, the answer is positive when you have two negatives.
Study this site carefully.
http://www.mathsisfun.com/positivenegativeintegers.html
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