6.1小数加减法 课件-2023-2024学年四年级下册数学人教版

小数加减法 铅笔、橡皮、直尺、学习任务单、草稿本 课前准备 整数加减法 个位对齐 算理： 相同计数单位相加减 方案A：老师出题，你们计算； 方案B：自己编题，自己计算。 探究方案 独立设计 3 道小数加减法的计算题，做好记录，并能说出你的设计意图。（只设计不计算） 活动要求 ① ② ③ ① ② ③ 笔算： 笔算： 推理 笔算： 0 推理 简洁美 ④ ③ ② ① ④ ③ ② ① 9个0.1 6个0.01 ① 9个0.1 6个0.01 相同计数单位相加减 算理： 小数点对齐 ② ④ ③ ④ ③ ② ① 9个0.1 6个0.01 0 ④ ③ ② 0 ④ ③ ② ① 9个0.1 6个0.01 0 转化 1 8 . 9 1 . 5 6 0 . 4 3 . 7 1 转化 小数加减法 整数加减法 小数点对齐 个位对齐 相同数位对齐 算法： 算理： 相同计数单位相加减 1. 口算 巩固提升 0.16 1 2. 在方框里填上正确的运算符号，并在合适的位置点上小数点。 巩固提升 回顾反思 学生1 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生2 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生4 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生3 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生5 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生6 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生7 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生8 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生9 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生10 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生11 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生12 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生13 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生14 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生15 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生16 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生17 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生18 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生19 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生20 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生21 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生22 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生23 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生24 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生25 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生26 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生27 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生28 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生29 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生31 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生32 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生33 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) 学生30 com.apple.VoiceMemos (iPhone Version 16.6 (Build 20G75)) $$