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Operations with Fractions
This will teach you about how to add, subtract, multiply and
                      divide fractions
                       By Stargirl
Introduction
In this presentation,
you will learn:

How to add fractions

How to subtract
fractions

How to multiply
fractions and

How to divide fractions

Hope you enjoy!
How to Add Fractions

Your equation is 3 1/2 +5 4/9

First, you have to change the denominators to the LCM
of 2 and 9.

So now the numbers are 3 9/18 +5 8/18

Add it, but don’t add the denominators.

So your answer is 8 17/18!

It’s the same steps for every one.
How to Subtract Fractions
The steps for subtracting fractions is almost the same for adding
fractions, but its’ just subtracting.

So your equation is 5 4/9 -3 1/2

Do the same as before, and find the LCM of the denominators

So now the equation is 5 8/18 -3 9/18

It doesn’t work, so turn the 5 into a 4 and add the 18 to the 8.

So NOW the equation is 4 26/18 -3 9/18

Subtract it but not the denominator, and now the answer is 1
7/18!
How to Multiply Fractions
Multiplying and dividing fractions are different from adding and
subtracting fractions

Your equation is 3 1/2 x5 4/9

First, change all the mixed numbers to improper fractions

So now the equation is 7/2 x49/9

It’ll be better if I draw it like this:

If you can simplify it, then do it. But here there are no numbers to
simplify, so just multiply it.

So the answer is: 343/18. Switch it to a mixed number so now it is 19
1/18!
Dividing Fractions

Dividing fractions are a bit like multiplying
fractions:

So the equation is         , so you have to change the
equation to multiplication. How? Change the second
fraction around so if it is 49/9, then change it to 9/49.

So now it is 7/2 x9/49. You do the same thing as
multiplying to see if you can simplify the units.

The answer is 9/14!
Done with the Presentation!




Done with the presentation, hope you liked it!

Thanks for watching!
Done with the Presentation!




Done with the presentation, hope you liked it!

Thanks for watching!

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Operations fractions

  • 1. Operations with Fractions This will teach you about how to add, subtract, multiply and divide fractions By Stargirl
  • 2. Introduction In this presentation, you will learn: How to add fractions How to subtract fractions How to multiply fractions and How to divide fractions Hope you enjoy!
  • 3. How to Add Fractions Your equation is 3 1/2 +5 4/9 First, you have to change the denominators to the LCM of 2 and 9. So now the numbers are 3 9/18 +5 8/18 Add it, but don’t add the denominators. So your answer is 8 17/18! It’s the same steps for every one.
  • 4. How to Subtract Fractions The steps for subtracting fractions is almost the same for adding fractions, but its’ just subtracting. So your equation is 5 4/9 -3 1/2 Do the same as before, and find the LCM of the denominators So now the equation is 5 8/18 -3 9/18 It doesn’t work, so turn the 5 into a 4 and add the 18 to the 8. So NOW the equation is 4 26/18 -3 9/18 Subtract it but not the denominator, and now the answer is 1 7/18!
  • 5. How to Multiply Fractions Multiplying and dividing fractions are different from adding and subtracting fractions Your equation is 3 1/2 x5 4/9 First, change all the mixed numbers to improper fractions So now the equation is 7/2 x49/9 It’ll be better if I draw it like this: If you can simplify it, then do it. But here there are no numbers to simplify, so just multiply it. So the answer is: 343/18. Switch it to a mixed number so now it is 19 1/18!
  • 6. Dividing Fractions Dividing fractions are a bit like multiplying fractions: So the equation is , so you have to change the equation to multiplication. How? Change the second fraction around so if it is 49/9, then change it to 9/49. So now it is 7/2 x9/49. You do the same thing as multiplying to see if you can simplify the units. The answer is 9/14!
  • 7. Done with the Presentation! Done with the presentation, hope you liked it! Thanks for watching!
  • 8. Done with the Presentation! Done with the presentation, hope you liked it! Thanks for watching!

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