Fraction Help Videos

Math 6 has been studying the concept behind fraction operations. Here are some videos to supplement your learning in case you need extra help:

BROWNIE PANS FOR MULTIPLYING FRACTIONS

SUBTRACTING MIXED NUMBERS WITH BORROWING - THIS IS TOUGH! This video is particularly great because it shows how to set up these problems vertically.

Students vs Beasts Project

Here are the instructions.
Here is a sample graph to use.

Here is the rubric:

Need help with the conversions? Check out this example:

Here are some examples (note they are not necessarily 4s or 3s - they are simply an example of what students have produced in the past):

Verizon Math

Check out this YouTube recording of a phone call between a customer and Verizon, a phone company in the US. It really shows the importance of knowing place value in decimals!!!

Here is an excerpt from the customer's blog:

I have a Verizon unlimited data plan in the U.S. and recently crossed the border to Canada. Prior to crossing the border I called customer service to find out what rates I'd be paying for voice and data. The data rate I was quoted was ".002 cents per kilobyte."

I received my bill and was charged $.002/KB - which is dollars - "point zero zero 2 dollars per kilobyte".

My bill for my data usage in Canada was therefore much greater than I had expected - using the quote I was provided before my usage.

I have tried to resolve this issue with customer service reps on the phone, but no one seems to see the difference between ".002 cents" and ".002 dollars".

Adapted from http://verizonmath.blogspot.sg/2006/12/verizon-doesnt-know-dollars-from-cents.html

Up for a challenge? Try these problems out!

1) Is the writer correct? Is .002 cents different from .002 dollars? Clearly justify why or why not.

2) Suppose the writer used 35,254 kilobytes. How much should his bill have been if charged in a rate per cent versus per dollar.

3) How do you think this confusion could be avoided? Design a poster or flyer that can help.

Hat Riddle!

Here's a new riddle..

Good luck!

Bridge Riddle

Can you solve the bridge riddle?

Check out this video from Ted Ed which gives you the riddle. Remember to pause when it tells you to since the second half of the riddle explains the solution.

Good luck!

Done with your MAP test?

Try out these brain teasers! Show all your work on a sheet of paper and bring it to Mr. Munden the next time you see him in class.

EASY

Science Students

Within the BrainBashers school, the science department has three disciplines.

In total, 280 students study chemistry, 

254 students study physics and 

280 students study biology.

97 students study both chemistry and physics, 

138 students study both physics and biology, 

152 students study both chemistry and biology.

73 students study all three disciplines.

Can you determine how many students there are in the science department? The answer is well below 814.

Squares

How many squares do you see in the image below?

MEDIUM

Transporting the Animals
A man wants to transport a fox, a chicken and some corn across a river.
He has a rowboat, but it can only carry the man and one other item.
If the fox and the chicken are alone together, the fox will eat the chicken.
If the chicken and the corn are alone together, the chicken will eat the corn.

How does the man do it?

HARD

The Egg Problem

Once upon a time, and old lady went to sell her vast quantity of eggs at the local market.

When asked how many she had, she replied:

Son, I can't count past 100 but I know that.

If you divide the number of eggs by 2 there will be one egg left.
If you divide the number of eggs by 3 there will be one egg left.
If you divide the number of eggs by 4 there will be one egg left.
If you divide the number of eggs by 5 there will be one egg left.
If you divide the number of eggs by 6 there will be one egg left.
If you divide the number of eggs by 7 there will be one egg left.
If you divide the number of eggs by 8 there will be one egg left.
If you divide the number of eggs by 9 there will be one egg left.
If you divide the number of eggs by 10 there will be one egg left.

Finally. If you divide the Number of eggs by 11 there will be NO EGGS left!

How many eggs did the old lady have?

RSA Encryption and Prime Numbers

Did you know that factoring is used everyday to keep your information online safe?

RSA encryption is the standard way that websites keep your information safe from hackers and thieves. For example, when your parents buy something online with a credit card, RSA encryption helps make sure that their credit card information is not stolen!

This is an awesome real-world application of factors.

Check out this cool Numberphile video to learn more: