Prove with Example that:-
(-) + (-) = ( + )
I like a good answer.
-2 (-3) + (-2) =
6 + (-2) =
6 - 2 =
4 (where as 4 is a positive)
RS for President!
It's not true for all numbers though, like:
-1(-1) + (-2) =
1 +(-2) =
unless you add one more set of brackets:
- ( (-) + (-) ) = (+)
You can think of the first negative sign as taking the opposite of what is in the first set of parenthesis. So the opposite of negative 6 is positive 6. And then positive 6 plus negative 5 = positive 1.
-(-6) + (-5)
6 + (-5)
if you use "x" with numbers you can get positive result.
- represent one seed;
+ represent two seeds; and let
( and ) both represent a mouth that will eat one seed if there is anything on offer.
On the left-hand side we get:
1 seed, eaten. Another seed, eaten. Two seeds, one eaten, one left. Another added but then that one is eaten. Remainder = one seed
On the right-hand side the action is much quicker:
A wasted bite (cheating here?!). Two seeds, one eaten. Remainder = one seed
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