Dividing mine
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A plus + a plus is a plus.
2
Yes it does. A minus is the opposite of something, so the minus of a minus is a plus.
Because both minus signs to be cut therefore minus * minus will be treated as plus numbers
A plus times a plus is still a plus. Below is the way I remembered it: If there is not a minus sign, it is plus (positive). If there is 1 minus sign, it is minus (negative). If there are 2 minus signs, it is plus (positive).