Deli Scientific Calculator

1. ANS function. 
2. Check and correct function. 
3. Fractional arithmetic function. 
4. Standard deviation calculation. 
5. Coordinate transformation.
6. Data edit.
7. Continuous calculation. 
8. Memory function10 variables .
9. Statistics calculations 240 functions Slide cover.
10. Big and clear display High-quality LCD display screen for clear reading.