| 摘要 |
The invention discloses an electronic abacus and operation method of the electronic abacus. The electronic abacus comprises a calculating apparatus, an input apparatus and a display apparatus. The input apparatus and the display apparatus are connected to the calculating apparatus respectively. The calculating apparatus receives the input information from the input apparatus, processes the information, and displays the processed information on the display apparatus. The input apparatus includes function keys and number input keys, said number input keys include several sets of numeral keys, each set of the numeral keys is corresponding to one digit of the input information displayed in the display apparatus. Each set of the numeral key includes the keys indicating "5", "-5", "4", "-4", "3", "-3", "2", "-2","1", "-1" respectively; When the addition or the subtraction is operated, because the negative number is directly input by pushing the key, it doesn't need for pushing the plus key, the minus key, the key for shifting the plusminus, so that the operation process is reduced.
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