Now add and subtract checking with concentrated schedule

 Now add and subtract checking with concentrated schedule, to allow students to learn Checking teaching

Take for instance the addition,UGG boots cheap, according to material given life situation topic map (my mother bought a sportswear and a pair of sports shoes 138 48 yuan,Discount UGG boots, a total of how much money? how to check the calculation of the addition The results? addition to checking into teaching. the whole process to reflect the student body,UGGs, I let the students to think independently, and then exchange in the form of panel discussions, checking method by the students say.

checking Although the initial contact, but many students because of the experience of life testing to do the accumulation of a small number of students by observing the relationship between the various parts of addition and subtraction, and soon found checking the three methods. (1) exchange the position of an addend plus again, (2) and reduced an addend,bailey UGG boots, addend is equal to another. As a student self-discovery and self-sum, students quickly master the checking method, and quickly understand the reciprocal relationship between addition and subtraction.