  The OH-509RT calculator has an extra-large 10-digit
LCD with numeric dot matrix readout. D.A.L. Direct
Algebraic Logic simplifies entry of equations, checking
D.A.L. shows expression and results simultaneously.
Users can "play back" equations to substitute new
numeric values. Continuous calculation function allows
user to keep the prior result for the next calculation.
Other features include: 183 functions, constant
calculation, 2 variable statistics.
|
|  
Creative Mathematics Teaching with Calculators
 |
