There are various dimensions to the learning manner in the mathematics class. For example, any textbook will ask the children to write the expressions for a task. However, at the introductory
stage in this textbook, the children do not know the expressions for a particular situation. This textbook carefully distinguishes different situations for each operation. After the ways
of calculation are taught, there are sequences to extend the numbers for the calculation. At the same time, we usually ask the children to develop the problem and the story for each operation.
And, finally, we introduce the world of each operation for the children to explore the pattern of answers and calculations.