Review the basic of subtracting negative numbers and try some practice problems. Subtracting a number is the same as adding the opposite of the number.
The last two examples showed us that taking away balloons (subtracting a positive) or adding weights (adding a negative) both make the basket go down.
Learn about and revise positive and negative numbers and how to add and subtract or multiply and divide them with BBC Bitesize KS3 Maths.
Example 1: Don't let all this talk of positive and negative numbers throw you off track—if you see a positive number minus a positive number, subtract it like.
Now, we are starting at a positive number, but we're adding a negative number, which means we'll be moving backwards (to the left) as if we were subtracting.
Adding and Subtracting with Negatives. Adding any number to its opposite —also called the additive inverse—always gives zero as the result. For example.
Draw your number line. Draw a long, horizontal line. Mark a short vertical line in the middle and label it "0." Make more.