The first known calculating device invented by a Chinese was
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- ______________ is the first known calculating device.
- Name the first calculating device.
- Which of the following is the first calculating machine invented by man?
- The first calculating machine was invented in
- The first mechanical calculating machine was made by
- Which of the following tools was developed by the Chinese, some 5000 years ago?
- One of the oldest calculating device was ______.
- Who devised the first calculating machine?