When you are adding a negative number to a negative number, it becomes subtraction, where you start from a negative point on the numbers line and move left. For example, -3 + (-2). This reads “negative three plus negative 2”. Then we subtract 2. The answer is -5.
What happens when you add 2 negative numbers?
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.
How do you add two negative numbers?
Note: Adding two negative numbers together? Just add the absolute value of each number together, put a negative sign in front, and you have your answer!
What happens when you subtract a positive from a negative?
When you add a negative number, you move to the left on the number line. Example 3: Subtracting a number is the same as adding its opposite. So, subtracting a positive number is like adding a negative; you move to the left on the number line.
Why negative plus negative equals positive?
Using the fact multiplication is commutative, a negative times a positive is also negative. Similarly, we can prove that a negative times a negative is a positive. Since we know that −ab is negative, and the sum of these two terms is 0, therefore (−a) × (−b) is positive.
What is the rule for adding and subtracting negative numbers?
The rule is: Adding a negative number is the same as subtracting the corresponding positive number.
Why do 2 negatives multiplied make 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.
When you add two negative integers do you always get?
Rule: The sum of any integer and its opposite is equal to zero. Summary: Adding two positive integers always yields a positive sum; adding two negative integers always yields a negative sum.
What happens if you subtract a negative from a negative?
Rule 3: Subtracting a negative number from a negative number – a minus sign followed by a negative sign, turns the two signs into a plus sign. So, instead of subtracting a negative, you are adding a positive. So we’re changing the two negative signs into a positive, so the equation now becomes -2 + 4.
What does a positive plus a negative equal?
Multiplication and Division If two positive numbers are multiplied together or divided, the answer is positive. If two negative numbers are multiplied together or divided, the answer is positive. If a positive and a negative number are multiplied or divided, the answer is negative.
