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本册复习的课时安排如下: 20以内数的认识1课时;20以内数的加减法1课时,加减法的关系和连加连减法1课时;加减应用题2课时,综合练习1课时。总复习共有19道习题,可选择合适的习题穿插到总复习之中去。 (一)20以内数的认识 20以内数的认识既是20以内进位加法和退位减法的基础,也是多位数认识的基础。这部分复习的重点是使学生掌握20以内数的读法和写法。复习时应强调:(1)突出认识计数单位“十”,明确11—19各数都是由1个十和几个一组成的。(2)区别1和10、2和20,
This book reviews the class schedule is as follows: Less than 20 times the number of understanding 1 class; 20 less than the number of the addition and subtraction method 1 class, the addition and subtraction of the law and even plus minus subtraction 1 class; . The total review a total of 19 exercises, choose the appropriate exercise interspersed into the total review. (A) Less than 20 The understanding of the number within 20 The number is not only the basis for the addition and subtraction within 20, but also the basis for multi-digit understanding. The focus of this part of the review is to enable students to master the number of readings and written within 20. Review should emphasize: (1) to highlight the count unit “ten”, clear 11-19 each number is composed of a 10 and a few. (2) Differences 1 and 10, 2 and 20,