Boeun+and+Sarah+817+-+topic+2

To add the fractions together:

This is our slideshow to explain how to add.

Enjoy!! =)

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first, if you **have the same denominator**, you just have to **add the numerators together** and the **denominator stays the __same__**. __**NEVER ADD THE DENOMINATORS**__! or it will give you the wrong answers.

second, if you have the **different denominator**, you __**have to find the *LCD**__ (Lowest Common Denominator) -> just do the multiplication table. For example, if you have 2/4 and 1/5, do like this:

4 -> 8 -> 12 -> 16 -> __//**20**//__ 5 -> 10 -> 15 -> __**//20//**__ -> 25

__LCD -> also known as Lowest Common Denominator__ Definition: the __**smallest common factor of the denominator**__. We __**use LCD**__ because it **__makes fraction operates easier__**

and as you see, the same numbers are 20. So the LCD of 2/4 and 1/5 is 20.

next, you have to know what gives you 20, when you multiply it by 4 and 5.

The answer is 4 for 5, and for 5, it's 4

IF YOU MULTIPLY SOMETHING TO THE DENOMINATOR, DO THE SAME THING TO THE NUMERATOR OF THAT FRACTION!!

To subtract the fractions:

This is a slideshow to explain how to subtract fractions. Enjoy!

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1. First, if the **denominators are the same**, just **subtract the numerators**, but **__DO NOT SUBTRACT THE DENOMINATORS.__**

2. Second, if the **denominators are different**, **convert it into LCD** (Lowest Common Denominator) than subtract it.

3. Third, if there is **mixed numbers, convert the fraction first**. If you **can't subtract**, for example if your fraction is like this ->

(2 2/5 - 4/5), than **borrow one from the whole number and than subtract**.

We just put the adding and subtracting slideshows together.

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Boeun and Sarah's project is a slide show with bubbleshare.

(coming soon)

Fraction Un - Assignment - Boeun & Sarah


 * **Information** || **Score** || **Total** ||
 * Information is accurate || 4,3,2,1 || 4 ||
 * Provides enough information to solve needed questions || 4,3,2,1 || 4 ||
 * Does extra to enhance the background information || 4,3,2,1 || 4 ||
 * **Viewability** ||  ||   ||
 * You want to stay and browse this site || 4,3,2,1 || 4 ||
 * The extra on this site teaches you about fractions || 4,3,2,1 || 4 ||
 * **Effort** ||  ||   ||
 * Just enough effort || 1,2 ||  ||
 * Average effort || 4,5 ||  ||
 * Good Effort || 6,7 ||  ||
 * Above and beyond the call of duty || 9,10 || 10 ||
 * || out of **30** || 30 ||
 * **Marked By Boeun s. & Sarah G.** ||