The sixth unit mainly studied additive commutative law, additive associative law, multiplicative commutative law, multiplicative associative law, multiplicative allocation rate, subtraction property and division property. These operation rules are applicable to integers, decimals, fractions and percentages, which are also the key and difficult points for children to learn. In order to consolidate the difficulties of this unit, after learning this unit, let the students organize their knowledge by drawing handwritten newspapers.
? For primary school students, the generalization of the algorithm is abstract. Through students' own summary, some scattered perceptual knowledge is raised to regular rational knowledge. They didn't understand the operation law from the beginning, but simply imitated the application of the operation law. Now they have a more rational understanding of the connotation of the algorithm and can use it flexibly and correctly for simple calculations.
? Students have made exquisite handwritten newspapers, wisdom trees and mind maps, which are novel in form, good at innovation, thinking and creation, and highlight mathematical characteristics. Through a handwritten newspaper, I saw that the children were sorting out the knowledge points of this unit of mathematics, and found the answer method summarized by the students themselves. I was even more shocked by the unique shape of the handwritten newspaper!
In this assignment, the students summed up the operation rules, deepened their understanding of this knowledge point, and also exercised their generalization ability and practical ability. At the same time, they also achieved the combination of play and learning, and the combination of play and learning in middle school made students realize that mathematics learning can be so interesting.