The Contex 10 mechanical calculator The Contex 10 mechanical calculator begin-post-stats Jaap Scherphuis • 2K views end-post-stats begin-duration 9:06 end-duration Math topics: _Elementary_arithmetic_##Elementary arithmetic##_0_(number)_##0 (number)##_Addition_##Addition##_Subtraction_##Subtraction##_Division_(mathematics)_##Division (mathematics)##_Numeral_systems_##Numeral systems##_Number_##Number##_Decimal_mark_##Decimal mark##_Numerical_digit_##Numerical digit Other topics: _Office_equipment_##Office equipment##_Calculator_##Calculator##_Processor_register_##Processor register##_Mechanical_calculator_##Mechanical calculator video-id: OWHzdrZjOvc channel_Jaap_Scherphuis_ So What Learning Elementary arithmetic , Numeral systems , Office equipment Saturday, January 20, 2018 Share Share
