When you have two negative signs, one turns over, and they add together to make a positive. If you have a positive and a negative, there is one dash left over, and the answer is negative.
What is the rule of negative and positive?
Rule
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+(+) Two like signs become a positive sign
−(−) 6−(−3) = 6 + 3 = 9
+(−) Two unlike signs become a negative sign
−(+) 8−(+2) = 8 − 2 = 6
How do you add a negative and a positive?
- Rule 1: Adding positive numbers to positive numbers—it's just normal addition.
- Rule 2: Adding positive numbers to negative numbers—count forward the amount you're adding.
- Rule 3: Adding negative numbers to positive numbers—count backwards, as if you were subtracting.
What is the rule when adding positive and negative numbers?
Rule
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+(+) Two like signs become a positive sign
−(−) 6−(−3) = 6 + 3 = 9
+(−) Two unlike signs become a negative sign
−(+) 8−(+2) = 8 − 2 = 6
What is the product of negative plus positive?
When you multiply a negative number by a positive number then the product is always negative.
Can you add negative plus to positive?
When you are adding a negative number to a positive number you are effectively subtracting the second number from the first. For example, take 4 + (-2). ... And then you add the negative number, which means you are moving to the left – in the negative direction.
Why does a negative plus a negative equal a positive?
Each number has an "additive inverse" associated to it (a sort of "opposite" number), which when added to the original number gives zero. ... The fact that the product of two negatives is a positive is therefore related to the fact that the inverse of the inverse of a positive number is that positive number back again.Mar 18, 1997