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.
Does a negative minus a negative go up or down?
Subtracting a negative number
Here’s the up and down rule: Subtracting a negative number is the same as adding a positive number — go up on the number line . ... When subtracting negative numbers, you can think of the two minus signs canceling each other out to create a positive.
What happens if you subtract a negative minus a positive?
Subtracting a negative number is the same as adding a positive number — that is, go up on the number line. ... When taking a negative number minus a positive number, drop both minus signs and add the two numbers as if they were both positive ; then attach a minus sign to the result.
What happens when you add a negative and a negative?
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). ... Then we subtract 2. The answer is -5.
What happens when you subtract a negative fraction?
A negative fraction added to another negative fraction will result in a negative fraction as result. A negative fraction subtracted from another is the same thing as adding the positive complement of that fraction . Make the denominators (the bottom of the fraction) the same, if they are not already.
What does a positive minus a negative equal?
):( Positive number plus a positive number, add the two numbers, and it equals a positive number. ):( Positive number minus a negative number switches the double negative to a positive; add the two numbers and it equals a positive number.
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 .
Do 2 negatives make a positive when multiplying?
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. ... Even in such general, non-numerical contexts, the property that the product of two negative things is positive still holds.
Why negative plus negative equals positive?
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 for adding two negative numbers?
Adding two negative numbers is easy: you’re just adding two “negative” arrows , so it’s just like “regular” addition, but in the opposite direction. For instance, 4 + 6 = 10, and –4 – 6 = –4 + (–6) = –10.
How do you subtract negative fractions with different denominators?
Find the difference. The LCM of 10 and 15 is 30 . To subtract the fractions with unlike denominators, rename the fractions with a common denominator. Since the denominators are the same, subtract the numerators .
What are the negative and positive rules?
- When adding positive numbers, count to the right.
- When adding negative numbers, count to the left.
- When subtracting positive numbers, count to the left.
- When subtracting negative numbers, count to the right.
