![]() ![]() Scott at also has put together a handy video on how to create a cheat sheet for multiplying negative and positive numbers (scroll down the page and you’ll find the video). Always start from the position of the first number. If you’re still confused over why a negative number times a negative number makes a positive number, Diana Brown at the Department of Mathematics, the University of Georgia, explains it in many different ways in this article. If you subtract a positive number you move to the left on a number line. We have one set of common rules which hold good for the addition and subtraction of integers. The addition of integers rules is important to understand as they have to be used while adding and subtracting integers rules. Adding an integer needs a specific set of rules. ![]() Here’s the overall rule to remember when multiplying positive and negative numbers: Integers are whole numbers that can be positive, negative, and zero. 2 x -4 are both negative, so we know the answer is going to be positive. If you look at it on the number line, walking backwards while facing in the negative direction, you move in the positive direction.įor example. Two negatives make a positive, so a negative number times a negative number makes a positive number. Rule 3: A negative number times a negative number, equals a positive 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.įor example: -2 x 4, which in essence is the same as -2 + (-2) + (-2) + (-2)Īnd as we said, if it’s the other way around 4 x -2, the answer is still the same: -8. When you multiply a negative number to a positive number, your answer is a negative number. Rule 2: A negative number times a positive number equals a negative number. ![]() 5 is a positive number, 3 is a positive number and multiplying equals a positive number: 15. This is the multiplication you have been doing all along, positive numbers times positive numbers equal positive numbers.įor example, 5 x 3 = 15. Adding two positive integers results in positive integers, whereas adding two negative integers will result in the sum with a negative sign. The general rule for a positive or a negative number is to change the sign of a subtrahend and proceed to addition. There are only three rules to remember: Rule 1: A positive number times a positive number equals a positive number. Add and subtract negative numbers, and see how absolute value can be used to find the distance between any two numbers on the number line. There are less rules when multiplying positive and negative numbers than in adding and subtracting positive and negative numbers. ![]()
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