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Extra information about fraction

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Basic Fraction

All about FRACTION

BONUS QUESTIONS?

Give these questions a try:


—1. Jessica bought 8/9 of a pound of chocolates and ate1/3 of a pound. How much was left?


—2. Sally walked 3/4 of a mile before lunch and 1/2 of a mile after lunch. How far did she walk in all?



—3. Don bought 3/4 of a pound of jellybeans and 5/8 pound of gummy bears. How much candy did he buy?



—4.Which apple weighs more, one that weighs 2/3 of a pound or one that weighs 5/6 of a pound?



—5. Stanley ordered two pizzas cut into eighths. If he ate 5/8 of a pizza, how much was left?

HOMEWORK --- Fractions: Multiplication & Division

—Multiplication rules:
1.Multiply 1st numerator to 2nd numerator.
2.Multiply 1st denominator to 2nd denominator.

Example:

—Division rules:

1.Keep the first fraction.
2.Change sign.
3.Switch number for the 2nd fraction
4.Then multiply

Example:

Extra notes (Click me for help)

Homework section: READ, PRINT, SHOW WORK, AND TURN THEM IN ON TIME :<)

Rules for HOMEWORK --- MUST READ!!!!!!

In this blog, students will have 3 homeworks to finish and turn in. You must read the instructions to do the homework:

1. Read the notes concerning about fractions.
2. Call and email me if you have questions related to the homework.
3. Print out the pages, or ask me for the copy if you can' print them.
4. Write out the answer on a blank paper with the answer and the problem and show your work.
5. ALL homework must turn in on the due date or will get grade deduction.
6. Make sure your name, date, topic, teacher's name are on the top of the left corner when turn in the homework.


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One more thing, there is a bonus section with some problems that you can answer or just try them out. I will give you 100% for try out the problem; I will give you 200 % for have them all correct. Anyhow, just some problems; give it a try and if you get stuck on something ask me and I will give you some hints.

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9. Bonus section - optional, but you will get 100% for trying.

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All About FRACTION

Fractions were invented long before decimal numbers, as a way of showing portions less than 1, and they're still hanging around.

They're used in cooking, in building, in sewing, in the stock market - they're everywhere, and we need to understand them.

3 (numerator)

__

4 (denominator) or written as 3/4

We can read this fraction as three-fourths, three over four, or three divided by four.

3/4 = 0.75
Every fraction can be converted to a decimal by dividing. If you use the calculator to divide 3 by 4, you'll find that it is equal to 0.75.

More examples:

1/2 = 0.5

1/4 = 0.25

1/8 = 0.125

Here are some terms that are very important when working with fractions.

Proper fraction: When the numerator is less than the denominator, we call the expression a proper fraction. These are some examples of proper fractions:

3/4

2/3

1/9

97/100

Improper fraction: An improper fraction occurs when the numerator is greater than or equal to the denominator. These are some examples of improper fractions:

5/4

9/2

6/6

19/7

Mixed number: When an expression consists of a whole number and a proper fraction, we call it a mixed number. Here are some examples of mixed numbers:

We can convert a mixed number to an improper fraction. First, multiply the whole number by the denominator of the fraction. Then, add the numerator of the fraction to the product. Finally, write the sum over the original denominator.

In this example, since three thirds is a whole, the whole number 1 is three thirds plus one more third, which equals four thirds.

Convert 1-1/3 to an improper fraction:

(1x3)+1 4

---------=---

3 3

Equivalent fractions: There are many ways to write a fraction of a whole. Fractions that represent the same number are called equivalent fractions. This is basically the same thing as equal ratios. For example: 2/4, and 4/8 are all equivalent fractions. To find out if two fractions are equivalent, use a calculator and divide. If the answer is the same, then they are equivalent.

HOMEWORK --- Fractions: Addition & Subtraction

Watch this video clip:

Why do need fraction?



http://mrcsclassblog.blogspot.com/2007/04/why-do-we-need-fractions.html



Extra notes about fraction:


ADDITION:

—Adding Fraction:
1.Find LCD or multiply the denominator of the second fraction
2.Then solve, example:
1/3 + 2/5 =
(1/3)*5 = 5/15
(2/5)* 3 = 6/15
=5/15 + 6/15 = 11/15




—Subtracting Fraction:
1.Find LCD or multiply the denominator of the second fraction
2.Then solve, example:
3/5 -1/4=
(3/5)* 4 = 12/20
(1/4)*5 = 5/20
=12/20 – 5/20 = 7/20



Do this homework: