# what are real numbers

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• Does anyone know what a real number is?﻿
• Hmm I don't know?
• What is a real number?﻿
• Our next topic is Rational numbers. A Rational number is a number that can be made by dividing two numbers ﻿
• ﻿Well lets start from the basics like Counting numbers...
• ﻿Exactly!
• So like 1,2,,3,4,5,6,7,8,9,10?﻿
• Next we have whole numbers...
• See Counting numbers are 0-10 and so on but Whole numbers are 1-10 and so on. ﻿
• No its not its very similar but not the same. ﻿
• But that is the same exact thing.
• Ohhh!!﻿
• Our next topic is Integers. An Integer is a whole number; a number that is not a fraction.
• Yes! Perfect you guys are really getting this now.﻿
• So Negative & Positive numbers like -5, 3,-13 and so on ?﻿
• Yes, but put it like this 1:2. ﻿ This is a Rational number or ratio for short.
• Ohh ok.
• So 1/2 ?﻿
• Our last topic is a cousin of the Rational number he is called the Irrational.
• An Irrational number is a number that cannot be expressed with any of the other real numbers. Makes sense?﻿
• Yes perfect so now you know all the sets of Real numbers. ﻿
• YAY!!!!! ﻿
• So like pi or 3.14 ?
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