|
Their numerals weren't handy for arithmetic, so ancient Romans did most of their calculating on this device |
an abacus
DD
|
$6,000 |
DJ |
MATH IN THE OLD DAYS |
2021-07-21 |
#8448 |
|
A calculating device with rows of beads strung on a wire & mounted on a frame |
an abacus
|
$100 |
J |
MATH |
1991-02-06 |
#1488 |
|
Calculating device the Chinese call the "suan pan" |
an abacus
|
$200 |
DJ |
MATHEMATICS |
1988-06-28 |
#897 |
|
This type of calculator was used by early Romans, then the Chinese, & the Japanese, who still use it |
an abacus
|
$300 |
J |
MATHEMATICS |
1987-12-15 |
#757 |