Adding and subtracting involving negative numbers can be challenging to some students if the rules on negatives numbers are not well understood. This article aims to provide clarity on this topic.

Part I covers the rules you need to apply when working with negative numbers and Part II goes through a few examples.

Part I – Rules involving negative numbers

Note: sometimes you find a bracket between 2 signs. e.g. -(-8). This is exactly the same as - - 8

Part II – Examples

One last thought…..

These 4 rules MAY seem a bit complicated at first, but as they are very common and frequently used in Algebra, you will get use to them and in time they will come naturally to you.

Part (I) - Quartiles & Interquartile Range
Range vs. Interquartile Range