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Adding and subtracting negative numbers
You should understand that negative numbers represent how far we are "below zero". Now you are ready to add and subtract them! In this tutorial, we will explain, give examples, and give practice adding and subtracting negative numbers. This is a super-important concept for the rest of your mathematical career so, no pressure, learn it as well as you can! Common Core Standards: 7.NS.A.1, 7.NS.A.1b, 7.NS.A.1c, 7.NS.A.1d
Using number lines and an understanding of absolute values, we walk you through the exercise of adding negative numbers.
Let's a take stab at adding numbers with both positive and negative signs. Using a number line makes this exercise easier and we recommend it.
Adding positive and negative single-digit numbers
Let's practice adding and subtracting both positive and negative numbers. Remember that two negatives make a positive, or another way of looking at, subtracting a negative is the same as adding.
Logic tells us (as does this video) that subtracting a negative number is the same thing as adding the absolute value of that number. Watch and be amazed.
Add and subtract positive and negative single-digit integers
Let's challenge ourselves with a word problem that requires us to plot points, positive and negative, and find the difference.