There are also integrated circuits in electronic calculators, but calculators have simple functions and cheaper prices, which are good for portability and good stability. Let’s follow the editor to learn how to choose a calculator.
1. When buying a calculator, you should first choose a good brand. It is recommended that you use the two brands of Cigna or Casio, because their quality and performance are relatively stable. However, there are many counterfeit products of this brand on the market. You must go to a reputable stationery store when you buy them, so as to avoid being deceived.
2. Before unpacking the calculator, carefully review the instructions. It is recommended that you do not buy calculators with button batteries.
3. At any time, you only need to enter “8÷9” and then press the “=” sign. If your calculator has twelve digits, the 12-digit “8” will appear on the display. If you If the calculator is 8 digits, then the 8-digit “8” will appear on the display. Next, you should carefully check whether the handwriting of each “8” is clear and whether there are missing parts. If the above does not appear Two situations can indicate that your calculator is normal.
4. When the power supply of the calculator is a dual-power ordinary battery + solar receiving board, the ordinary battery should be removed first, and check whether the solar receiving board has a digital display. When the display is not clear, please swing it in the auxiliary lighting area . When the screen displays the word 0, then it can be proved that the solar panel is intact.