Showing posts with label subtracting. Show all posts
Showing posts with label subtracting. Show all posts

Saturday, November 3, 2012

Adding and Subtracting Integers


When first learning how to subtract real numbers, it is useful to think of this operation as adding opposite numbers. For example, 5 − 2 can be thought of as adding five with the opposite of two 5 + (−2). This may seem cumbersome, but sometimes it can help in understanding problems where you wish to subtract a negative number.

Two sequential negative signs, as seen above, is equivalent to addition. When adding two negative numbers the result will be negative. For example, if you spend $12.00 for a pair of shoes and $25.00 for a bag then you will owe $37.00 at checkout, −12 − 25 = −37.

Add and Subtract.
Video Examples on YouTube: