December 23, 2011

PRIME NUMBERS

Prime numbers have captured the hearts of many mathematicians for centuries.  During 18th century, mathematician Christian Goldbach (1690-1764) wrote to Leonhard Euler that he believed it could be shown that every even integer greater than 2 is the sum of 2 primes.  For example, 30 = 23+7 and  36 = 13+23.  Until now, this conjecture has neither been proved or disproved.

Monday, December 19, 2011 - Cool Brain Teaser

Click on the link below and scroll down to the "Freaky Frogs" brain teaser.

http://www.puzzle.dse.nl/teasers/index_us.html#square_puzzle

Can you get the frogs to switch places on the lily pads???

Thursday, December 15, 2011 - Digital Exit Pass

Post your answer. (Make sure to include your first name with your answer.)

5 x 1/2            3 1/3  x  1 5/6

Thursday, December 8, 2011

Instructions

Each student has been assigned a topic from "Skills You'll Need" on page 116 to 119 in Unit #4.  Your task is to review your section and answer the following questions on the construction paper provided.  You will then present your work to the class tomorrow.

Questions
1) Explain how you would solve a problem using this skill.
2) Develop a simple question involving this skill.
3) What is the "golden nugget" (key learning) for this skills?

Once you are done, your final mission is to answer this problem in your notebook.  We will review this question after the presentations tomorrow.

A seventh grade class took a poll to find out their favorite ice cream. 1/4 chose chocolate, 1/4 chose vanilla and 1/2 chose strawberry. 2 kids are lactose intolerant and can't eat ice cream. If there are 22 kids in the class, how many kids liked each flavor? Explain


Once you are finished you can practice using fractions on some of the fractions games available here
- click on this link -  http://www.softschools.com/math/fractions/

Tuesday, December 6, 2011 - Trick to Converting Repeating Decimals into Fractions in Simplest Form!

First I will need a random repeating decimal.

"0.57575757575757..."

Thank you. This would be 19 / 33.

"Wow! How did you do that?"

Simply take the number that repeats, in this case 57, and divide it by however many 9's as there are digits in the original number. Since 57 is 2 digits, then I would divide 57 by 99.

57 / 99 simplifies down to 19 / 33.

We can check our answer by dividing 19 by 33, which equals 0.57575757575757575757

Friday, December 2, 2011

Check out this slideshow of examples of "Geometry in the Real World"!!!

http://www.slideshare.net/CanuteIsInBlock2/geometry-in-the-real-world-2701453

Thursday, December 1, 2011 - Cool Math Trick!!!

Directions

1. Think of your age in years.

2. Multiply your age by 2.

3. Add 10

4. Multiply by 5.

5. Add # of siblings you have.

6. Subtract 50

Look at your final answer; the first 2 digits are your age and the last digit is the number of siblings in your family.  Have someone else try it!  Kind of cool!