Is a positive multiplied by negative number is always 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.
Is a positive times a negative a positive?
Negative times positive is always negative This means that an expression with one negative number (like multiplying a negative number by a positive one) will always turn out negative. Otherwise, though, multiplying with negative numbers works just like multiplying positive numbers.
Why does a negative number times a negative number equal a positive?
Explanation: We know that negative times anything means that it will change the sign. Ideally, the second negative should change the sign of our original number (which is also negative). So, our original negative sign is changed into a positive sign when a negative is multiplied to it.
What is the rule for positive and negative numbers?
The rules for multiplication and division are simple: If both numbers are positive, the result is positive. If both numbers are negative, the result is positive. (Basically, the two negative values cancel each other out).
When you multiply a negative times a negative?
Why a negative times a negative is a positive.
What happens when you multiply a positive number by a number greater than 1?
Whenever you multiply a positive number by a factor greater than 1, the product will be larger than the original number. Whenever you multiply a positive number by a positive factor less than 1, the product will be smaller than the original number.
What is negative times positive equal?
Rule 2: A negative number times a positive number equals a negative number. When you multiply a negative number to a positive number, your answer is a negative number. It doesn’t matter which order the positive and negative numbers are in that you are multiplying, the answer is always a negative number.
What’s a positive times a negative?
What’s a negative times a positive?
What happens when you add a positive number to a negative number?
Adding a positive number plus a negative number: Drop the plus sign, turning the problem into subtraction. Adding two negative numbers: Drop both minus signs and add the numbers as if they were both positive; then attach a minus sign to the result.
What is a negative times a negative?
When you multiply a negative by a negative you get a positive, because the two negative signs are cancelled out.
