Archive for Decimals

Metric Me Conversion Mnemonics

In science we are using a variety of measuring instruments from dressmaker’s tape to calipers to measure various parts of our bodies. Then we’ll be converting those measurements into different units and creating our likeness with our correct height. However, our bodies will be compressed horizontally. Here is a fun website that has a variety of mnemonics to help you remember the SI Unit conversions. Can you think of other ones? Submit a comment if you have one that we could benefit from.

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Converting Fractions to Decimals to Percents

The eighth graders are reviewing converting fractions to decimals to percents. They need to create notes to remind them of the process and they need to be prepared to explain how to do this to the 7th graders. Next week the 8th graders will have to teach the 7th graders, then there will be a pair quiz on Tuesday consisting of an 8th grader partnered with a 7th grader. So be prepared!

Here are some YouTube videos to support you:

1. My (MVMS) famous “Decimals to Fractions” YouTube video

2. NASAConnect Percents, Fractions and Decimals video – a fairly basic video; if you really struggle with this concept, you may want to start with this video

3. Fractions to Decimals

Here is a website that I created about fractions. Go to the module that says “Fun Fractions Games and Practice.” The following games will help you practice:

a. Equivalent Fractions Game

b. Quia – Equivalent Fractions Concentration

c. BCC Saloon Snap Fractions, Decimals and Percents Card Game.

Enjoy… and good luck on Tuesday’s quiz.

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Decimals Review

Here is a quick review on operations with decimals. This video is on subtracting decimals.

Strategy: Before you calculate the exact answer, estimate. Use the estimate to check for the reasonableness of your answer.

Estimate these answers. Then calculate. (Answers are below.)

1. 7.8 + 0.45
2. 45.3 +17.07
3. 32.04 – 7.8
4. 6.3 x 2.4
5. 9.2 / 2.5
6. 12.3 x -3.06
7. -6.3 – 4.2
8. 8.2 – 12.03

Answers:
1. Estimate: 8 Answer = 8.25
2. Estimate: 62 Answer = 62.37
3. Estimate: 24 Answer = 24.24
4. Estimate: 12 Answer = 15.12
5. Estimate: 3 Answer = 3.68
6. Estimate: -36 Answer = -37.638
7. Estimate: -10 Answer = -10.5
8. Estimate: -4 Answer = -3.83

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Fractions to Decimals Song

Here’s a Math 7 classic song, “Fractions to Decimals.” Feel free to sing along at home.

The key to changing fractions to decimals is that you need to understand what the decimals mean. For example, 0.9 is 9 tenths, 0.07 is 7 hundredths and  0.103 is one hundred three thousandths. If you’re not solid with this skill, come in and get help.

Decimals to Fractions Song
Decimals to Fractions
Decimals to Fractions
Say it. Write it. Simplify it.

– Sing to “We Will We Will Rock You” by Queen
Lyrics by Yours Truly, Ms. Newburn

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Writing Prompt: Comparing Decimals & Percents

Is 0.003 more than 1%? Explain.

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Fraction Test Retake Help

I hope everyone is enjoying the last few days of vacation. I promised I’d post some resources for people who needed to take the retake. Remember in order to do the retake, you must correct the original test. The answer keys are posted in the classroom window. Retakes will be Thursday at lunch, Thursday after school and Friday at lunch. The maximum grade on a retake is 85%. Test corrections for people not retaking the test will be due by Friday for a 2% increase. Remember all people must choose two problems and write a few sentences about how to do the problem correctly.

All Classes
The following resources are on my fractions website, but here are direct links to some of the areas you may want to focus on:
1. Adding & Subtracting Fractions
2. Change Percents to Decimals
3. Change Fractions to Percents
4. Comparing Fractions & Decimals
5. Comparing Fractions, Decimals & Percents
6. Saloon Slap Game: Compare fractions, decimals and percents

There is currently a scarcity of good fractions tutorials on the web. I was planning on making a bunch of YouTube videos over the break, but I’ve been without a whiteboard for a couple of weeks and just got one made yesterday. Ugh! I’ve been playing with iMovie but I can’t upload them because I haven’t learned how to configure my new computer to my Internet at home…. so what all that means is that the YouTube videos will be a little late in their debut. Sorry. 😦 The good news is that I will be available at lunch all week if you have questions. 🙂

Here are two videos in the rough because my PC wouldn’t recognize my iMovie.
YouTube Video: Find the LCM & GCF Using Venn Diagrams
Helpful for large denominators
YouTube Video: Writing Exponents in Expanded Form
This is a basic skill needed in order to divide monomials.

Remember there is a basic multiplying & dividing monomials video on a previous post. If the concept is gotten fuzzy in your mind over the break, it would be 5 minutes well spent to watch it.

Math 7*
I have one YouTube video up about negative exponents. It’s a fairly advanced one.If you are struggling with the basic concept, come see me or get help from a friend.

See you all soon and if you haven’t checked out the 2007 New Year’s Resolution post, I recommend it.

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