A prefix operator is an operator that is applied to the variable, constant, function, or parenthetic expression that immediately follows it. The plus sign (+) and minus sign (-) can be used as prefix ...

3. Principal of the present arithmetic operation system The principal of the present arithmetic operation system resides in that ¡°digit number is changed simply by changing a digit-number parameter ...

From classrooms to kitchen tables, debates about math education are never far away. Should teachers drill multiplication ...