Table 1.

Answers to the simple problems

Type of problems	Answers	Types of errors	Types of support
A train traveled 98km in 11 hours; how many km does the train travel in one hour?	Impossibility 48 11	Difficulty understanding the relationship between data Difficulty organizing the data in the algorithm Difficulty understanding the processes of distance and time	Mathematical explanation of the data through the schematic drawing Organization of the data in the algorithm, writing of the decimal numerical system
A 48-km road is being built; how many cars pass during a day?	None because they were building it 12 + 48 1 4 48	Difficulty in analyzing and relating the parts of the problem Difficulty finding other ways to solve	Explanation and division of the structure of the problem Reflexive questions towards the structure of the problem

Note. Table 1 contains the answers of the pupils to the simple problems.