How long do you live?

How Long You Really Live

Hi, my name is Angelina, and I’m going to teach you how many hours you live, how many minutes you live, how many days you live, etc.

            Everybody lives for about 75 years in a lifetime. To find out how many days you live, you would do 75 (years you live) x 365 (days per year), and it equals 27,375. Therefore, you live for about 27,375 days. To find out how many hours you live, you would have to multiply 27,375 (days you live) by 24 (hours per day), to equal about 657,000 hours in your lifetime. Next, do 657,000 (hours you live) by 60 (minutes per day) to find out how many minutes you live, and 657,000 x 60 = 39,420,000 minutes in an average lifetime. Finally, multiply 39,420,000 (minutes in a lifetime) by 60 (seconds per day) to equal 2,365,200,000 seconds you live in your lifetime.

Here is the chart to show you how many years, days, hours, minutes, and seconds you live:

Years	Days	Hours	Minutes	Seconds
75	27,375	657,000	39,420,000	2,365,200,000

How Many Seconds?

Hi I'm Will. I was interested in how many seconds were in different periods of time. So I figured it out.

1 minute = 60 seconds
1 hour = 3,600 seconds
1 day = 8,640 seconds
1 week = 604,800 seconds
1 year = 31,556,926 seconds
5 years = 157,784,630 seconds
10 years = 315,569,260 seconds
50 years = 1,577,846,300 seconds
100 years = 3,155,692,600 seconds
1,000 years = 31,556,926,600 seconds
10,000 years = 315,569,260,000 seconds
100,000 years = 3,155,692,600,000 seconds

WOAH!

What do you notice? Do you see any patterns? How did I figure this out?

Video Preview: Percentages

We are learning about percents. To show our learning we are making a video about tips and tax at a restaurant. We are giving you a little sneak peek of our video. So, four people go to a restaurant and buy orange juice, two sodas, a fruit bowl, mini hotdogs, steak mashed potatoes and peas, pizza and fries,  a sandwich and fries, burger and fries, 3 doughnuts, pie slice, and ice-cream. If the subtotal is $36.00 and pay 7% tax and we leave a 15% gratuity (a fancy word for tip), what is the total cost of our dinner?

Post your guesses in the comments below, and stay tuned for our video.

Thanks,

Caroline, Cal, Morgan, Albert, Justin, Michael

Read This! Spaghetti and Meatballs for All

Hi, I'm Albert and I read Spaghetti and Meatballs for All by Marilyn Burns.

This book is about a couple who wants to host a dinner party for 32 people. They rent 8 tables and 32 chairs and try to set them up so each table has 4 chairs.  First they set up the tables so 8 tables form a 1x8 rectangle but that only seats 18 people. They kept trying different options to get all 32 people seated. Finally they set up the 8 tables seperately so that there were 4 chairs at each table and since 8x4= 32 all the people could sit.

This book teaches about perimeter by showing that if the tables were connected, less people could sit down but by having them seperate, more people can fit which means the perimeter is greater.

Discounts!

We've been learning about percentages and shopping discounts. After solving several "percent off" porblems, we created our own. Here they are:

1. Leo dcided to buy 12 dog bowls for a dog show. Each dog bowl cost $10. The store had a 10% discount. How much did she end up paying after the discount? (By: Angelina)

2. To get 5 of Adam's lollypops it costs $2. If I promise not to raid Adam's room for one week, the lollypops will be 15% off. How much will they cost if I do not raid his room for a week? (By: Sydney, Adam's sister)

3. You can get a dog for 8 payments of $480. If you want to pay for the dog all at once, you will get a 25% discount. How much would the dog cost if you pay for it all at once? (By: Will)

4. At Southern Season you bought a jar of ketchup that originally cost $4. It was in the "Summer Sale" bin and marked "25% off." How much did you actually pay for the ketchup? (By: Michael)

5. Joe wanted to buy a apartment that cost $20,000. He happened to have a apartment coupon, so he got 10% off the price. How much did he save? How much did it cost with after the discount? (By: Justin)

6. Fred is selling a 100 crate gold bar. He says you can give him $1,000,000 or give him a sandwich and get a 35% discount. How much money would the gold bar cost if you give Fred the sandwich first? (By: Albert)

Try some of them out and post your answers below.

A Multiplication Problem

Hi! We're Kevin and Simon. This is the equation 11 x 32 = 352 using inch cubes. We did this by combining Justin, Jackson, and Ari's idea (see the Centimeter Cube Challenge) but with inch cubes. First we solved the problem and then turned the inch cubes into numbers. Then we finished the problem and took a picture. Here it is: 

Exploring Area

Last week we explored area. We were given a certain area and then asked to create a geometric shape on a geoboard to represent that area. We then had to color in our shape on grid paper. Here is some of our work:

This irregular polygon has an area of 8.5 square inches



This irregular polygon has an area of 7 square inches



This irregular polygon has an area of 10 square inches




Here is one sample of completed work.
This student chose to label each square so that it was very clear what the area was.




Here is another work sample.
You can see there are some irregular polygons and two rectangles.


We noticed that there are often many ways to represent the same area. For example if you are making a figure with an area of 12 square inches, you could have a 1" x 12" rectangle, 3" x 4" rectangle, or a 2" x 6" rectangle. It is also possible to create an irregular polygon with an area of 12 square inches.

We also noticed that when working backwards from a given area, the rectangles you can make are the same as the factors for that number. For example, the factors of 12 are 1 and 12, 3 and 4, and 2 and 6. We also made a connection between area and arrays (a way we use to solve multiplication problems before we memorized our math facts). It is neat to see how it all goes together.

Is there anything you notice that you would like to share with us?

Speedy Sam

Hi. I'm Alana and this is a math game we sometimes play in our class called Speedy Sam.

Two players stand back to back and a third person, the caller, calls a math fact SLOWLY. As each part of the fact is called, each player takes a step forward. Then, after the word "equals" is called, the players whirl around and shout the answer as quickly as possible. The person who says the correct answer first is the winner and another challenger steps up to try to beat them.

For example, if the fact is 3 x 6, the caller would say each part separately. The caller says "3." The players take a step. The caller says "times." The players take a second step. The caller says "6." The players take a third step. The caller says "equals." The players take a fourth step, turn around, and yell the answer.

We plan on making a video demonstrating Speedy Sam. Until we get it made and posted, please comment if you are still confused.

Screen Casting: Basics of Multiplication

Hi! We're Ari and Lena. We created a screen casting to teach you some basics about multiplication. We hope you enjoy it! Thanks for watching!

Screen Casting: More Lattice

We're Morgan and McKenna and we created this screen casting to teach how to solve multiplication problems using the lattice method. Enjoy!

A Multiplication Trick

I'm Cal and here's a multiplication trick.

You can make a multiplication problem like 900 X 600 really easy. All you have to do is look at the first numbers in the problem, in this case, 9 and 6. Then multiply them together, which is 54. Then take all the zeros and put them behind the 54, which makes 540,000.

Screen Casting: Lattice

This is a screen casting video that we made to teach others how to solve multiplication using the lattice method. Enjoy!

                                            -Justin and Alex



Screen Casting: Math Rhymes

This is a screen casting video that I made with Sydney. It includes different tricks you can use to help you solve multiplication and division problems. These tricks are easy to remember and can help you solve some short multiplication and division problems that you can't quite remember. This video gives you helpful tricks for: 8 x 8, 6 x 6, and 56 / 7.

Thanks for watching!

--Angelina 

Screen Casting: What is Multiplication?

Recently, we explored making screen casting videos. Screen casting is when you capture what you write on the SmartBoard. It's an easy way to make a movie. With proper planning, you can easily make a simple screen casing video in about 15 minutes. If you wanted to add titles and music, it could still be done in a half an hour or less. Here is a very simple screen casting video. We'll upload some more later. Also, if you are interested in the planning part or how to screen cast, comment below and we'll devote a few blogs to the "how" of screen casting. Enjoy!