第1单元 100以内的加法和减法(三) 练习二（课件PPT）-【优翼·学练优】2022-2023学年二年级数学上册同步备课（苏教版）

苏教版二年级上册 练习二 第一单元·100以内的加法和减法(三) www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 100以内的加法和减法 知识回顾 内容 计算方法 连加 连减 混合计算 配平问题 从左到右计算 用竖式计算 优先凑整十/整百 增补法 删减法 移多补少法 比多少问题 www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 64+8+17= 89 92-6-42= 44 56-9+40= 87 练习题 1. 详解 详解 详解 【点击详解可见具体解题过程】 www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 练习题 +9 +9 +9 +9 +9 18 42 35 -7 -7 -7 -7 -7 -5 -5 -5 -5 -5 27 36 45 54 63 35 28 21 14 7 最后一个怎么算呢？ 40 45 50 55 60 【点击详解可见具体解题过程】 详解 2. www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 练习题 56(面) 30+26= 答:做了56面红旗，16面绿旗。 做了多少面红旗，多少面绿旗？ 16(面) 30-14= 详解 详解 红旗 绿旗 【点击详解可见具体解题过程】 3. www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 练习题 小军拍的数量＜20,比20小的最大数是19。 小军最多拍了多少下，小强最少拍了多少下？ 小强拍的数量＞20,比20大的最小数是21。 4. 答:小军最多拍了19下，小强最少拍了21下。 www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 思考题 交换②和④，或交换③和⑤ 交换哪两筐，可以使两车运的苹果个数同样多？ 1 2 3 4 5 6 www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 64 + 08 ? ? 7 2 + 17 ? ? 8 9 返回 练习题 【点击返回可回到题目处】 www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com www.youyi100.com 92 - 6 ? ? 8 6 -