What are the rules for multiplying negative numbers?
There are two simple rules to remember: When you multiply a negative number by a positive number then the product is always negative. When you multiply two negative numbers or two positive numbers then the product is always positive. 3 times 4 equals 12.
What happens when you multiply by negative number?
When you multiply two negative numbers together, though, the first one flips the sign from positive to negative, and the second one flips it back. In other words, negative numbers cancel each other out: when you multiply a negative number by a negative number, you get a positive number.
What is the rule when multiplying negative and positive numbers?
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.
How do you multiply a negative exponent?
To multiply by a negative exponent, subtract that exponent. To divide by a negative exponent, add that exponent.
How do you divide positive and negative numbers?
Divide a positive number by a negative number. To do this, divide the integers as usual, then place a negative sign in front of the quotient. A positive number divided by a negative number is always negative. This also is the rule when dividing a negative number by a positive number.
What are the rules for adding and subtracting negative numbers?
Here’s the up and down rule for adding a negative number: Adding a negative number is the same as subtracting a positive number — go down on the number line. Subtracting a negative number is the same as adding a positive number — go up on the number line.
How do you add negative and positive numbers?
Adding Positive and Negative Numbers 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.
How do you subtract two negative numbers?
Using a Number Line Draw your number line. Start with the first number in your problem. Review how to add positive numbers. Subtract positive numbers by moving left. Add a negative number. Subtract a negative number. Add two negative numbers. Subtract two negative numbers.