Japanese Money

by Tomohide Shimodaira

Dear Patti and friends,

Hello!! I am Tomohide Shimodaira. I am a boy of10 years old. I am very sorry I delayed very much. First, I would like to make 25yens by japanese coins. But, this quiz is somewhat difficult for me. So, I was helped by my father (Hideo) and my mother (Yukari).

Our unit of measure with regard to money is the "yen ". Now, the yen is almost same worth as cent.

In Japan, we have these yen bills and these coins:

10,000 bill about $100
5,000 bill
1,000 bill about $10
500 coin
100 coin about $1.00
50 coin
10 coin
5 coin
1 coin about one cent

There isn't 25 yens coin, in Japan.

I was very surprised, there are many ways to make 25yens.

1 x 25 = 25 yen
1 x 20 + \5 x 1 = 25 yens
1 x 15 + \5 x 2 = 25 yens
1 x 15 + \10 x 1 = 25 yens
1 x 10 + \5 x 3 = 25 yens
1 x 10 + \5 x 1 + \10 x 1 = 25 yens
1 x 5 + \5 x 4 = 25 yen
1 x 5 + \5 x 2 + \10 x 1 = 25 yens
1 x 5 + \10 x 2 = 25 yens
5 x 5 = 25 yens
5 x 3 + \10 x 1 = 25 yens
5 x 1 + \10 x 2 = 25 yens

Twelve ways, to make 25 yens!! So, I think there are 13 ways to make 25 cents in U.S. Is that right?

Then I would like to tell about favorite things. I like play soccer. Recently, soccer is the most popular soprt for kids in Japan. Because, professional league (called 'J league') was opend two years ago. You know, last year, all U.S. team played very well, in the world soccer cup. We are enjoied very much. B!!And I like swimming. I swim every friday at the swimming school. Now, I am practicing one-persone 100m medley. First, swimming the butterfly, and next is swimming the back-stroke, and swimming the breast stroke, an the last is swimming the crawl (25m each).

What is your favorite sports.

all the best,
Hideo and Tomohade

Back Menu

| home | global projects | interactive math applets |

Math presentation prepared by Joyce Perdue and Patti Weeg
for the National Title 1 Conference - Tampa, Florida: January 24-26, 2002
| Authors in Residence | Elementary Math Students in the CyberZone |

www.globalclassroom.org
January 2002