minus 1 (-1) and plus 1 (+1) are two integers. That is why, when -1 and plus one are operated or, are solved the answer is zero. as, on a number line the positive integers are greater than the negative ones. so, the sum would look like, +1-1 / -1+1. Using the addition property of an integer, +,- is equal to -. IE, plus, minus = minus. so it is -1-1=0and when +1-1 yet, 1-1=0 so answer is 0.
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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).
plus times plus = plus minus times plus = minus plus times minus = minus minus times minus = plus so when you subtract a number it is the same as adding its negative; for example 7 - 4 = 3 7 + (1)(-4) = 3
-1
minus 1
1