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## Kindergarten

### Unit 2: Lesson 2

Making small numbers

# Making 5

Learn how to add numbers to make the number five. Created by Sal Khan.

## Want to join the conversation?

• Are all negative numbers rational?
• Decimals ar irrational, since they aren't whole. They have fraction parts to them, so they are like mixed numbers.
(1 vote)
• How many times can you divide a fraction? I mean as in dividing the number 279/1908?
• You can divide a fraction an infinite amount of times, but it will get extremely small after you divide it about 5 or 10 times.
• just why does the number 5 so important?
• the number 5 is a physical representation of 5 things. although the symbol we use for 5 can be changed, the value of 5 will always exist because it is necessary for every number after 5
• what are rational and irrational numbers?
• A rational number can be expressed as a fraction, a irrational can't.Just a simple explanation, hope this helps!
• 345, 353, 897 You do this by looking at the first place values which are 3,3, and 8. So you can tell just by the 8 that it will be last. Let us go back to the 3's. Since they both have 3 in the first place value move to the second. In the second place value, they have a 5 and a 4. So 4 is LESS than 5. So the one with 4 goes first. The one with 5 goes second, and the one that has 8 goes last :)! This is called least to greatest. If you wanted greatest to least it is 897, 353,345!
• How do you know all the different ways to make five. by LilyAnna
• Technically speaking there are infinite ways to make five. An example would be 10,000 - 9,995 = 5 or -5 + 10 = 5 and you could go on from there.
• Isn't there like no difference between making 5, 10, and 20
• Yes, their is a difference between those numbers.
(1 vote)
• comeon,how many ways to make fives
• 5 is an odd number. So there will be 1 way, 5 is a prime number.