April 20, 2012 - Archimedes the Great Mathematician

Check out this interesting video on Archimedes and his discoveries!

http://www.youtube.com/watch?v=OYG23J-hQ4M&safety_mode=true&persist_safety_mode=1&safe=active

April 12, 2012 - Adding and Subtracting Integers

Check out this great video on Adding and Subtracting Integers. (Khan Academy)

http://www.youtube.com/watch?v=C38B33ZywWs&safety_mode=true&persist_safety_mode=1&safe=active

April 2, 2012 - Subtracting Integers

Your Task... You will use the skills you have learned during this period to solve a challenging question involving Integers!

Instructions;
1) Click on the link to the Math Makes Sense tutorials available on the "Cool Math Links" section of the blog.
2) Watch the tutorial entitled "Subtracting Integers with Tiles".
Optional - Watch the tutorial entitled "Subtracting Integers".
3) Complete the Quiz.
4) Solve the Integer Problems!! provided in class  - we will review this tomorrow.  If it is not completed in class it is considered homework.

Extension - Integers and Algebra - Euchlid's Theory

Read over the article available on the link below. (Values are substituted for the variables that make the expression true.)

                         http://nrich.maths.org/1357


Questions
First we notice that 13x+29y=42 has many solutions, for example x=1, y=1 and x=30, y=−12. Can you find others (it has infinitely many solutions)?

2x+4y=13 has no solutions because 2x+4y must be even and 13 is odd. Can you find another equation that has no solutions?

Post your solutions!!!

March 30, 2012 - Unit 9 Integers!!!

1) Define and provide an example for each of the Key Terms at the beginning of Unit 9.
- HWK Check on Monday.

2) Review the Tutorial for "What is an integer" and "Adding Integers".
Optional - Review the tutorial on "Comparing and Ordering Integers".
a) Complete the Quiz at the end of each tutorial.
b) Use the skills that you have learned to solve the problems  assigned to you. (The first two letters in your name are above the two questions that you are asked to solve.)

Tutorial Link - if the link doesn't work, just copy it to the browser and press enter.
               
                          http://www.pearsoned.ca/school/math/mathmakessense7/

Integer Problem - Post your answers as a comment on our blog.
Ph.
a) (+10) + __ = +25
b) (+4) + (+3) + (-6) =
Ni.
a) -20 + __ = +15
b) -2 + (-4) + (+1) =
Er.
a) +35 + __ = +17
b) +12 + (-3) + (-2) =
Ma.
a) (-10) + __ = (-25)
b) -2 + (-4) + (+1) =
Ka.
a) (-20) + __ = -15
b) +6 + (-8) + (+12) =
Me.
a) -35 + __ = +17
b) -5 + (-8) + (-10) =

March 29, 2012 - Do you have the answer?

If you wrote all the numbers from 300 to 400 on a piece of paper, how many times would you have written the number 3?

March 29 - interesting Method used to solve Percent Problems!!!

Click on the link below to view a demonstration of the "Grid Method". View the demonstration and solve the problems included using this method.  Once you are done, post a comment about it. Do you like it? What are some of the things that you like about it?  What do you dislike about this method?

http://www.wisc-online.com/objects/ViewObject.aspx?ID=ABM801

Monday, March 12 - Camel Question 2.0

Camels and Bananas

A camel has to carry 3,000 bananas across a 1,000 mile dessert. There are two conditions: 1. The camel can only carry 1,000 bananas at a time. 2. The camel eats one banana for each mile he travels. What is the maximum number of bananas that will reach the other side of the desert? What if you have three camels?

Awesome Percent Game - Create a park!!!

Check this out!  Let us know how far you have gotten.

http://www.kidsmathgamesonline.com/numbers/percentages.html

What do you think of this game?  Have you found a better game that involves percent? Let is know...

March 7th and 8th - Great Math Game and Practice Activities involving Percent!!!

Number Invaders!!! What is your highest score?

http://www.mathplayground.com/balloon_invaders_percent.html

Click on the link below to view a video about the math concepts we learned about today!!!

http://www.mathplayground.com/howto_findsaleprice.html

Practice questions for Percent - find one, solve it and share it in class tomorrow.

http://www.mathplayground.com/SMP_Percent.html

Cryptopics link and link to Percentage Game

Check out the link below for more "cryptopics" puzzles...

http://www.yarivh.com/cryptopics/index.htm

Enjoy!

Click on the comments - Eric and Maisie found an electronic version of Cryptopics online!  Use the link Maisie posted.

Link to Math Makes Sense Tutorial! Check it out!

Having trouble with a math concept and you can't wait until tomorrow to discuss it in class!!!

Click on this link and check out the tutorial on any concept in our textbook!
https://2007.hcdsb.org/owa/redir.aspx?C=6d063210c74a4ad5b3f9b9577088cb1d&URL=http%3a%2f%2fwww.pearsoned.ca%2fschool%2fmath%2fmathmakessense7%2f

Possible Research Topic for our Data Management Project

Use this link to view sales stats from each month in 2010 and 2011.  Your comparison could be between Xbox hardware sales and Wii hardware sales.

http://vgsales.wikia.com/wiki/NPD_sales_figures

You will need to click on each month and write the sales amount in a table.  Then plot the data on a scatterplot graph.

January 24, 2012 - Analyze the Data - Is there a relationship between temperature and ice cream sales?

Ice Cream Sales vs Temperature
Temperature °C	Ice Cream Sales
14.2°	$215
16.4°	$325
11.9°	$185
15.2°	$332
18.5°	$406
22.1°	$522
19.4°	$412
25.1°	$614
23.4°	$544
18.1°	$421
22.6°	$445
17.2°	$408

And here is the same data as a Scatter Plot:

 

Line of Best Fit

You can also draw a "Line of Best Fit" (also called a "Trend Line") on your scatter plot:

Try to have the line as close as possible to all points, and as many points above the line as below.

Random Math Thoughts

Use this section to document any interesting math thoughts that you might have!

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