No a positive plus a positive is not a negative its a positive. because um lets say 6+7 there is no negative number so its just like regular adding.
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yes you can. You can add and subtract ANY number, negative or positive, even if it is a decimal. For example 1 + 1 = 2 -1+-1 = -2 -1+1 = 0 A minus plus a minus is a minus. A minus plus a positive is a minus.
-5+-3 = -8 ++ Add -- Add +- Subtract -+ Subtract
Add or plus.
You actually take the positive, and put it in front:2+-5=?Then make the negative positive and subtract:2-5=-3dude just reme.... + plus a + = +and a - plus + = -and a - minus a - equals a -and a - minus a plus a + = -ok... sozz... a bit unclear... =='
The same as with positive ones. Make sure they have the same denominator and add or subtract their numerators.