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# Abacus Operator Report

For the WebQuest Activity

## A Creative Encounter of the Numerical Kind

**Step 1:** Save this page to your
personal network drive (Save As; Drive h; Abacus Operator Report; OK). Or, you can save it to your customary data storage
location.

**Step 2:** Use the “Back” arrow on the
browser toolbar to go back to the WebQuest instruction page.

**Step 3:** After reopening this page in a
separate window, you are ready to type the answers as you visit the Internet
sites on the WebQuest.

*Visit each of
the following Internet sites, which are linked on the Process Page of the
WebQuest*.

- The Invention of the Abacus

- When was the abacus invented?

- What two early civilizations do we think could have
invented the abacus?

- What were the materials used for the first abacus?

- Abacus Introduction: The Art of
Calculating with Beads (Read the section on “Basics” and
investigate the Figure/Applet)

- What is the value of one of
the beads on the top row?

- What is the value of one of the
beads on the bottom row?

- How do the rows relate to
place value?

- Double click the beads on the
abacus to reset all row values to 0.
Click the beads to make the abacus show the number 15. Hit Alt/Print Screen to capture the
picture and paste it here:

8. What is the
Salamis Tablet?

- Counting in various number systems

- Did the Greeks and Romans have a symbol for 0?

- How did the Greeks and Romans show 0 on an abacus?

- How is the Chinese suan pan
different from the European abacus?

- What did the Japanese name
the two parts of their abacus?

- Scroll down to the larger
abacus and practice counting in different bases. Manipulate the abacus by clicking on the beads. Reset the “radix” to smaller numbers
for counting in smaller bases. Make
sure you are especially familiar with counting in base 4, since you will
have to show this counting method during the group presentation.

### Reflection

### Can you see any advantage in using an abacus
instead of a modern calculator? Be sure
to explain your answer in detail.