2. Decimals A real-world use of math in the school library media center! 001.25 398.2 423 590.14 914.243 623.98

3. The Math Side n Decimal Notation n Comparing Decimals n Ordering Decimals

4. The Library Side n The Dewey Decimal system provides the specific order to arrange library books. n It keeps topics that are similar and alike close together on the shelf.

5. REF 510.2 SMI Library Books n Call numbers are typed onto spine labels n The call numbers use a combination of letters and numbers FIC CLE 001.25 AWE Ramona Quimby, Age 8 by Beverly Cleary Math and Its Importanceby Professor DuPre Computers are Fun by Dr. Awesome

6. Melvil Dewey In the 1800s, how did libraries put the books on the shelves in order ? ? ? b.1850 d. 1930 Famous Librarian who invented the Dewey Decimal System. In order by date the books arrived at the library!

7. What did Melvil do? It was really hard to find the books you needed, so Melvil Dewey studied the problem and invented a new way to arrange the library books. The story goes something like this...

8. Dewey thinks about man. Melvil Dewey imagined himself to be a primitive man. He asked himself questions that he thought that a cave man might have asked himself.

9. Man thinks about himself PHILOSOPHY & PSYCHOLOGY 100 WHO AM I?

10. Man thinks about God. RELIGION & MYTHOLOGY 200 WHO MADE ME?

11. SOCIAL SCIENCE 300 Man thinks about other people. WHO IS THE MAN IN THE NEXT CAVE?

12. LANGUAGE 400 Man learns to communicate with words. HOW CAN I MAKE THAT MAN UNDERSTAND ME?

13. SCIENCE 500 HOW CAN I UNDERSTAND NATURE AND THE WORLD AROUND ME? Man learns to understand nature in land, sea, and sky.

14. APPLIED SCIENCE & TECHNOLOGY 600 HOW CAN I USE WHAT I KNOW ABOUT NATURE? Man learned to make things he needed.

15. FINE ARTS & RECREATION 700 HOW CAN I ENJOY MY LEISURE TIME? Man does things he enjoys and creates art.

16. LITERATURE 800 HOW CAN I PASS DOWN MY THOUGHTS AND IDEAS TO MY CHILDREN? Man becomes a storyteller.

17. HISTORY, GEOGRAPHY, & BIOGRAPHY 900 HOW CAN I LEAVE A RECORD FOR MEN OF THE FUTURE? Man records events and people.

18. MANY SUBJECTS GENERAL WORKS 000 BIBLIOGRAPHIES BOOKS ABOUT BOOKS ENCYCLOPEDIAS GENERAL REFERENCE BOOKS

19. Organize our library so we can locate and access books on the same topic on the shelves. What do the numbers of the Dewey Decimal system do for us today?

20. Decimal Order How in the world do you put decimals in order? For example: 500.9 629.8 252.1 591.2 620.8 658.7 914.56 970.23

21. Step #1: 252.1 500.912 500.91 591.2 620.8 620.49 629.8 658.7 914.56 970.51 970.23 Put the whole number parts in order.

22. Step #2: Rearrange the numbers so the tenths digits are in order. 252.1 591.2 500.912 500.91 620.49 620.8 629.8 658.7 914.56 970.23 970.51 252.1 500.912 500.91 591.2 620.8 620.49 629.8 658.7 914.56 970.51 970.23

23. Step #3: Rearrange the numbers so the hundredths digits are in order. 252.1 591.2 500.912 500.91 620.49 620.8 629.8 658.7 914.56 970.23 970.51 252.1 591.2 500.91 500.912 620.49 620.8 629.8 658.7 914.56 970.23 970.51