Teaching rational numbers to 3rd grade students is something that will require you to express those numbers as A/B. Teach rational numbers to 3rd grade students with help from a professional private tutor in this free video clip.

Save

Teaching rational numbers to 3rd grade students is something that will require you to express those numbers as A/B. Teach rational numbers to 3rd grade students with help from a professional private tutor in this free video clip.

Part of the Video Series: Math Made Easy

Promoted By Zergnet

Hi, I'm Rachel, and today we're going to be going over how to teach rational numbers to the third grade. The definition of a rational number is something that can be expressed as A/B, a fraction right, as we know it, so anything that you can write as A/B is a rational number. This includes 0, right, it includes all negative numbers and positive numbers right, in both directions on the number line. So negative three is a rational number, five halves is a rational number because you can write negative three as negative three over one, right you can express it as a fraction and halves you can write as a fraction. That's a rational number. An example of an irrational number is something like Pi and third grade is usually a good time to start introducing the concept of Pi. Pi is approximately 3.14 and it keeps going on and on and not repeating forever and ever and we cannot write this as a fraction like A/B and so it is an irrational number. Even if a number repeats such as 8/9ths right? When you divide it, that's going to go on and on, .8 repeating but you can write it as a fraction and so it's rational. Pi, we cannot write as a fraction so it's an irrational number. I'm Rachel and thanks for learning with us today.