For example, it can also be written like this subtraction problem below.Įvery time we see a problem adding two negative numbers, we can rewrite the problem to look more like a subtraction problem. For example,īut we also have to be mindful because there’s more than one way to write this problem. When we add (or sum) two negative numbers, the answer will be a smaller negative number. When we add two or more positive numbers together, our sum will be a higher positive value. When we add two positive numbers, the sum of these numbers will create a larger positive number. Let’s take a look at some of these interactions more closely. Which direction will we be going on the number line?īy asking these questions, it helps us know where to start and what is happening based on the operation. What number are we starting at on the number line?Ģ. When we add or subtract positive and negative numbers, we can ask ourselves these two questions.ġ.
#NEGATIVE AND POSITIVE RULES FOR SUBTRACTION HOW TO#
Let’s look at some number interactions and begin with how to add and subtract positive and negative numbers.Īdd and Subtract Positive and Negative Numbers Generally, when we subtract, we move left on the number line, and generally when we add, we move right on the number line. We can use our number line to help us with addition and subtraction problems. These interactions happen through mathematical operations. Once we are comfortable with the number line and comparing different numbers, we can practice how these numbers interact with each other. So as we move along the number line, before we change from negative into positive or vice versa, we have to remember to count the number zero. The number zero (0) is neither positive nor negative. For example,Īs we go right on the number line, our numbers are getting larger. For example, in the classroom, negative numbers commonly occur in functions, and outside the classroom, it is a common topic in finance.Īs we go left on the number line, our numbers are getting smaller. Even if we don’t realize it, negative numbers play an essential role in many math topics. This is because there are so many instances in which we have to count things or perform any essential operation (addition, subtraction, multiplication, and division). If you haven’t seen our first four posts, check out these links!Įvery day we work and interact with positive numbers. This is the fifth post in our Number Properties series. We will discuss adding and subtracting positive and negative numbers, multiplying and dividing positive and negative numbers, and rules for positive and negative numbers.
This Student Guide focuses on Positive and Negative Numbers. Understanding how numbers interact can help you predict the outcomes of a problem, better understand equations, and check the work you’ve done.
A strong foundation in Number Properties helps build a strong foundation in all mathematical concepts.
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