Please provide a rating, it takes seconds and helps us to keep this resource free for all to use
Welcome to our Math lesson on Number Line, this is the second lesson of our suite of math lessons covering the topic of Number Sets, Positive and Negative Numbers and Number Lines, you can find links to the other lessons within this tutorial and access additional Math learning resources below this lesson.
Numbers can be shown in a number line where the number zero is taken as origin. Positive numbers are usually placed on the right of origin while negative numbers are on its left, as shown in the figure below.
It is evident that the value of numbers increases from left to right in the number axis.
We use arrows to represent any increase or decrease of a number in the number line. For example, when the number 2 increases by 5 units, we can express this event in the number line as follows.
As a result, the new number obtained is 7 because 2 + 5 = 7. On the other hand, when the same number decreases by 8 units, we obtain
Negative numbers are very important; they allow us to express quantities that are smaller than zero. For example, if the outside temperature in a cold winter day is 5 Celsius degrees below zero, we write t = -5°C. Likewise, if a given location is below sea-level, we take its altitude as negative. For example, instead of saying "The Dead-Sea as the lowest place on Earth is 1360 ft below sea level", we simply say "The altitude of the Dead-Sea is -1360 ft."
Enjoy the "Number Line" math lesson? People who liked the "Number Sets, Positive and Negative Numbers and Number Lines lesson found the following resources useful:
Please provide a rating, it takes seconds and helps us to keep this resource free for all to use
We hope you found this Math tutorial "Number Sets, Positive and Negative Numbers and Number Lines" useful. If you did it would be great if you could spare the time to rate this math tutorial (simply click on the number of stars that match your assessment of this math learning aide) and/or share on social media, this helps us identify popular tutorials and calculators and expand our free learning resources to support our users around the world have free access to expand their knowledge of math and other disciplines.