Solution:
Solve by measurement:
The length of the segment AB is cm. Why is the fourth part of this segment equal?
What is the length of three-fourths?
Solve by fractions:
The length of the segment AB is 12 cm. Why is 1/4 of this segment equal? What is
the length of 3/4?
It is recommended to formulate the concept of fractions in three main stages:
1) first, children learn the actual fragmentation (division) of various specific objects at the part level; form fractions;
2) then the children do the same work already on the drawings (drawings of circles, segments);
3) children operate on the imagination.
Answer:
- thinking arises as a means of solving
the practical problems facing the child in the subject activity;
- in solving the practical problems combines subject actions with mental, which causes the emergence of rational ways of action.
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