The main components of the calculator are as follows: 
 1. Display. Use the numbers show various command and 2. The on 
 is the power source, refute numbers and all orders 
 3.The CE (clear) button is used to clear the numbers on the screen to display the number 0 
 4. Button shows the order in various number systems, both. ,,,,, X /% 
 5. The numbers show the number and 10 since 0-9 decimal 
 6.The input to the memory (memory) 
 7. Buttons that assist in the work of various faster (button "delete end" (backspace), button. "-") 
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