Dividing by 0.1, 0.01,...

Notes from today

Dividing Fractions with Models

Here is a post on how to divide fractions by whole numbers using a model. Video

Here is a video on how to divide fractions by fractions using a model. Video

Multiplying Fractions

Watch this video to review how to multiply fractions using an area model (and a KitKat - Yummy)!

Here is a video that reviews how use basic multiplication to multiply a fraction by: another fraction, a whole number, a mixed number and it includes a practice question for you.

Here is a pic of one group's work in class today. Tejasv suggested that to figure out the fraction,
of pie that Rob ate, you should divide 100 by 12.5.
Why does this work to find the denominator for the fraction of pie he eats?
Record your answer in the comments here and remember to include your name:)

Multiplying Fractions with a Model

Here is a video with the kit kat lesson on it from class today.

What is a possible way that someone might get confused when they are trying to multiply fractions with a model?

What do you know about the answer to a multiplication question when the numbers you are multiplying are fractions? (Hint- How is it different than multiplying 2 whole numbers?)

Adding and Subtracting Fractions

Check out this video on adding and subtracting fractions. When you are working on these, remember back to September when we were working on lowest common multiples. They are important now for helping to find common denominators.


What steps do you need to follow when you need to add fractions with different denominators? List and give an example of them.

Fractions - Comparing and Ordering and review of Multiplying by a Whole

 This video has a review of what we worked on in class on Friday - multiplying fractions by a whole number. Pay attention to his trick for figuring out if a fraction is 'proper' or 'improper.' Kind of a funny way to think about fractions.

Can you think of a time when this example might not apply?


Here are some videos to help you with:

understanding fractional pieces (watch this first) and comparing and ordering fractions.

Here is another option for a way to compare fractions using decimals (great if you want to check your work with a calculator).

What can you say about several fractions with the same numerator but different denominators?

What can you say about several fractions with the same denominator but different numerators?

Which way do you prefer to use to compare and order fractions?



BONUS
Check out this contest. 

Comparing and Ordering Fractions - a preview

Here is a video with some good review for comparing and ordering fractions.  - starts with BASICS review

Here is a video for comparing fractions using common denominators.
Could you use this same method to compare fractions using a common numerator instead? How would that have a different impact on the question?

Math Sites for Practice

Here are a few sites that you can use to practice the algebra that we have been learning:

Equations
http://www.math-play.com/One-Step-Equation-Game.html
http://www.xpmath.com/forums/arcade.php?do=play&gameid=64#.UP66xnLhdBI
http://www.hstutorials.net/math/alg1_Glencoe/a1G_02/variable_on_bothSides_level_0.htm           

Fractions

http://www.mathsisfun.com/fractions_multiplication.html        has some worksheets at the bottom
http://www.mathplayground.com/fractions_div.html            -game to practice dividing fractions

Dividing Fractions with Models

 Explain how 4/8 divided by 8 is 1/16th. If you are having trouble, check online with your ilc account, or try and relate this question to a real life example (use apple pie - it is less messy than lemon).

Here is our first problem from today to help you.