Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Transcript of Fractions
What do the different parts mean?
How do I add/subtract two fractions?
How do I multiply/divide? a presentation by Gavin and Chris 1. What are Fractions? A fraction is "A numerical quantity that is not a whole number"
-thefreedictionary.com Examples 3/4 1/2 2/3 7/8 4/5 simplifying fractions Fractions can look different, but have the same value.
Getting a Fraction to it's most simple form, is called "simplifying" Examples: We have the fraction
72/81 After simplifying we have
8/9 Now we have the fraction 4/8 Once simplified, we have 2/4 But we can simplify further to get 1/2 Different parts of fractions There are two parts of a fraction: the numerator and the denominator. The numerator represents how much of a whole number is present within the fraction. The numerator is located on the top of a fraction, and the denominator is located on the bottom Example: 9/10 This is the numerator. The denominator represents the number needed in the numerator to achieve a whole number. Example: 7/15 This is the denominator. When adding fractions, the numerator changers, but the denominator doesn't. Examples: 4/9 + 4/9 = 8/9 5/9 + 4/9 = 9/9 = 1 Adding and subtracting fractions Subtracting fractions is basically the opposite of adding fractions, except that the numerator changes and the denominator stays the same. Examples: 4/9 - 3/9 = 1/9 8/10 - 5/10 = 3/10 Multiplying / dividing fractions When dividing fractions, there's a special property where it is possible to simplify the two fractions diagonally. When multiplying fractions, both the numerator and the denominator can change. Examples: We have the equation
8/9 * 7/8 Multiplied we get
56/72 Now we can simplify it.
We can see, that 4 is a common factor This gives us 14/18. Further Simplified:
7/9 Multiplication Division Now we've got a Division problem: 4/5 ÷ 2/3 With a small Trick we can make it into a Multiplication problem SO,
4/5 ÷ 2/3
4/5 * 3/2 Now we can treat it like a multiplication problem!
4/5 * 2/3 = 12/10 = 6/5