
Elektronika MK-61 Calculator Operating Instructions
10
Draft version 1.0 – Oct.2014
Please send corrections to Jose Mesquita ([email protected])
5.1.
Primary functions on the key caps
The exterior view of the original Russian MK-61 is shown in Fig.1 below.
to
,
- Numeric keys for data entry into the register X, using digits 0
through 9, plus the decimal point.
,
,
,
- Keys to do arithmetic operations
2
(addition, subtraction,
multiplication and division).
2
This is a RPN calculator, therefore it uses postfix notation where the parentheses and the equal keys
are not needed. To do a math operation, first enter the operand(s), then chose the operator.
LED
Display
Angle
Switch
"Radians /
Grads /
Degrees"
Power
Switch
"ON /
/ OFF"
Fig.1. Exterior view of the micro calculator (MK)
Keyboard