Answer:
Independent variable: CALCULATOR
dependent variable: SPEED AT SOLVING LONG DIVISION PROBLEMS
controlled variable: SAME GRADES, SAME PROBLEM
Explanation:
Independent variable is the variable that is changed or manipulated by the experimenter in an experiment. In this experiment, the independent variable is the CALCULATOR, which was changed in the experiment.
Dependent variable is the variable that is measured in the experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the SPEED AT SOLVING LONG DIVISION PROBLEMS.
Controlled variable or constants are variables that are kept unchanged for all groups throughout the experiment. In this experiment, the controlled variables are: SAME GRADES, SAME DIVISION PROBLEM
