Abacus, best for teaching children Arithmetic.
Ancient calculator.
3000 Years ago, Chinese people use it for arithmetic calculation.
It is the most important tool for ancient accountants, cashiers,buyers,and kinds of traders.
Tips:
Upper 2 rows each represent 5 units.
Lower 5 rows each represent 1 units.
You can use any column as your ten's,hundred's,thousand's digit.
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| 熱門國家 | 系統支援 | 版本 | 費用 | APP評分 | 上架日期 | 更新日期 |
|---|---|---|---|---|---|---|
| 未知 | Android Google Play | 1.3 App下載 | HKD$19.9 | 1970-01-01 | 2015-04-23 |
