Finding the percent of a number information (part 3) and emergency lesson plans

Examples on how to find the percent of a number may be found in the following video.

Emergency lesson plans may be found here: Monday, Tuesday, Wednesday, Thursday, Friday.


Students have an assignment from study island that must be completed.

Also remember to continue to study and have your parents sign off on your study log.



Below are notes related to finding the percent of a number.

Finding the percent of a number information (part 2) and emergency lesson plans

The following video contains more information on how to quickly find the percent of a number.

Emergency lesson plans may be found here: Monday, Tuesday, Wednesday, Thursday, Friday.





Additional notes for part 2 are below.

Finding the percent of a number information (part 1) and emergency lesson plans

One method that may be used to find the percent of a number is to use benchmarks to calculate the percent of a number. For example 10% of 300 is 30. That means that 5% of 300 is half that. Therefore 5% of 300 is 15. We can use these relationships to find the percent of any number.

Emergency lesson plans may be found here: Monday, Tuesday, Wednesday, Thursday, Friday.



Additional notes for part 1 are below.

Cooking with proportions

Proportions, or equal ratios come up when we deal with food.

The following video demonstrates that.




If you would like more information about when you should set up a proportion please look here.
The homework tonight is to read pages 198 to 200 and do numbers 6 -25, 33-35.



The following poster describes when it would be appropriate to set up a proportion to solve a word problem.




Also, the following pdf was originally published by the Texas Education Agency. It is the April 2009 released TAKS test:



You may find more information about the TAKS test here: http://eigthgrademathmocity.wikispaces.com/TAKS+information

Computers use scale factor

The following video demonstrates how we use scale factor every time we use a computer.


Also, please sign in to your gaggle account tonight to complete the quiz that I emailed to you.

Scale factor is a proportional concept

If two figures are similar then there should be a scale factor that can be applied to one figure to get the sides of the other. The following video demonstrates how we can undertsand what similar figures really mean.

Scale Factor, Similarity, and proportions are related concepts

Scale factor describes the relationship between similar figures. The word "factor" is often connected to multiplication. Remember in elementary school you learned that factor times factor equals product. So in the statement "2 times 3 equals 6", 2 and 3 are factors of 6. Therefore scale factor tells us how two similar figures are related through multiplication. For example, if you have two similar figures where on the original figure a side is 2 feet and on the corresponding (matching side) of dilated figure is 6 feet, the scale factor is 3 because 2 times three equals 6. The following video shows a bit about how scale factor may be found in similar figures.

Remember that you DOthe scale factor. You write a ratio with the Dilated side over the corresponding or matching side on the Original figure.

Do not forget to complete the homework. The homework for tonight is page 209 numbers 13, 14, 16, 17, 20-24.

More on Dilations

Please click on the following link: http://eigthgrademathmocity.wikispaces.com/Scale+factor+questions

Similarity and Scale Factor

The Homework tonight is to read section 4-5 and to do pg. 209 numbers 5-12,18,19.

Here is the final exam schedule

The final exam schedule can be found below.

Your project is due tomorrow

Some of the projects that have been returned so far have been very well prepared. I am looking forward to the others that will be handed in tomorrow. If you need to email it to me you may find my email address on the school web site.

Today we discussed scale factor as it relates to similar figures.
To find the scale factor remember DO (dilation over the original) or NO (New over the Old)
You may find additional information about it here.



The notes from today are below.

Application of constant of proportionality

A proportional situation may be examined in a table. The following video shows that the constant of proportionality is the same as the unit rate and may be used to determine if a situation is proportional. Notice also how we use our TIPS problem solving format. At the end of the video I meant to say the problems on the left.)



The problem that was worked out is in the pdf below.

Proportions

There are several ways that we can use to determine whether a situation is proportional. One way is using the constant of proportionality. If a situation has a constant of proportionality it is proportional. If it does not have that constant then it is not proportional.This is is explained in the following video.

If you would like more information about proportions click this link or this link

Do not forget that your project is due on Friday. Also, I will be checking your study sheets. If you lost it, you may obtain a copy here. Or go to http://www.fortbend.k12.tx.us/campuses/mcms/TeacherDocuments.cfm?TeacherIndex=33314&ResourceIndex=33770
and click on study log.