一年级数学下册教学课件-2整理和复习-人教版 (32)

一年级数学下册教学课件-2整理和复习-人教版 (32)

整理和复习 破十法 想加算减 连减法 多余条件 一个数比另一个数多（少）几？ 减法 13 – 4 12 – 3 11 – 2 11 – 3 12 – 4 12 – 5 12 – 9 12 – 6 12 – 7 12 – 8 11 – 5 11 – 6 11 – 7 11 – 9 11 – 8 11 – 4 13 – 5 13 – 6 13 – 7 13 – 8 13 – 9 14 – 9 14 – 6 14 – 5 14 – 7 14 – 8 17 – 9 15 – 7 15 – 9 15 – 8 15 – 6 16 – 7 16 – 9 16 – 8 17 – 8 18 – 9 11 – 2 11 – 3 11 – 5 11 – 6 11 – 7 11 – 9 11 – 8 11 – 4 12 – 9 13 – 9 14 – 9 17 – 9 15 – 9 16 – 9 18 – 9 小组活动 1 按一定的顺序摆出退位减法表。 活动要求： 1 、小组合作先计算出所有的算式。 2 、想一想排列的方法和顺序 ，再合作排列出退位减法表。 13 – 4 = 9 12 – 3= 9 11 – 2 = 9 11 – 3 = 8 12 – 4 = 8 12 – 5 = 7 12 – 9 = 3 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 9 = 2 11 – 8 = 3 11 – 4 = 7 13 – 5 = 8 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 13 – 9 = 4 14 – 9 = 5 14 – 6 = 8 14 – 5 = 9 14 – 7 = 7 14 – 8= 6 17 – 9 = 8 15 – 7 = 8 15 – 9 = 6 15 – 8= 7 15 – 6 = 9 16 – 7 = 9 16 – 9 = 7 16 – 8= 8 17 – 8 =9 18 – 9 = 9 小组活动 2 观察表格 , 发现规律。 活动要求： 先从不同方向观察减法表，再把你的发现和同组同学说一说。 观察表格 , 发现规律 11 – 2 = 9 11 – 3 = 8 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 9 = 2 11 – 8 = 3 11 – 4 = 7 13 – 4 = 9 12 – 3= 9 12 – 4 = 8 12 – 5 = 7 12 – 9 = 3 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 13 – 5 = 8 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 13 – 9 = 4 14 – 9 = 5 14 – 6 = 8 14 – 5 = 9 14 – 7 = 7 14 – 8= 6 17 – 9 = 8 15 – 7 = 8 15 – 9 = 6 15 – 8= 7 15 – 6 = 9 16 – 7 = 9 16 – 9 = 7 16 – 8= 8 17 – 8 =9 18 – 9 = 9 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 11 11 11 11 11 11 11 11 横着看 被减数不变， 减数连续减 1 ， 差连续加 1 。 观察表格 , 发现规律 11 – 2 = 9 11 – 3 = 8 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 9 = 2 11 – 8 = 3 11 – 4 = 7 12 – 3= 9 12 – 4 = 8 12 – 5 = 7 12 – 9 = 3 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 13 – 4 = 9 13 – 5 = 8 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 13 – 9 = 4 14 – 9 = 5 14 – 6 = 8 14 – 5 = 9 14 – 7 = 7 14 – 8= 6 17 – 9 = 8 15 – 7 = 8 15 – 9 = 6 15 – 8= 7 15 – 6 = 9 16 – 7 = 9 16 – 9 = 7 16 – 8= 8 17 – 8 =9 18 – 9 = 9 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 11 11 11 11 11 11 11 11 横着看 被减数不变， 减数连续减 1 ， 差连续加 1 。 观察表格 , 发现规律 13 – 4 = 9 12 – 3= 9 11 – 2 = 9 11 – 3 = 8 12 – 4 = 8 12 – 5 = 7 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 8 = 3 11 – 4 = 7 13 – 5 = 8 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 14 – 6 = 8 14 – 5 = 9 14 – 7 = 7 14 – 8= 6 15 – 7 = 8 15 – 8= 7 15 – 6 = 9 16 – 7 = 9 16 – 8= 8 17 – 8 =9 12 – 9 = 3 11 – 9 = 2 13 – 9 = 4 14 – 9 = 5 17 – 9 = 8 15 – 9 = 6 16 – 9 = 7 18 – 9 = 9 9 9 9 9 9 9 9 9 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 竖着看 减数不变， 被减数连续加 1 ， 差也连续加 1 。 观察表格 , 发现规律 13 – 4 = 9 12 – 3= 9 11 – 2 = 9 11 – 3 = 8 12 – 4 = 8 12 – 5 = 7 11 – 5 = 6 11 – 4 = 7 13 – 5 = 8 14 – 5 = 9 12 – 6 =6 12 – 7 = 5 11 – 6 = 5 11 – 7 = 4 13 – 6 = 7 13 – 7 = 6 14 – 6 = 8 14 – 7 = 7 15 – 7 = 8 15 – 6 = 9 16 – 7 = 9 12 – 8 = 4 11 – 8 = 3 13 – 8 = 5 14 – 8= 6 15 – 8= 7 16 – 8= 8 17 – 8 =9 12 – 9 = 3 11 – 9 = 2 13 – 9 = 4 14 – 9 = 5 17 – 9 = 8 15 – 9 = 6 16 – 9 = 7 18 – 9 = 9 9 9 9 9 9 9 9 9 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 竖着看 减数不变， 被减数连续加 1 ， 差也连续加 1 。 观察表格 , 发现规律 11 – 3 = 8 12 – 4 = 8 12 – 5 = 7 12 – 9 = 3 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 9 = 2 11 – 8 = 3 11 – 4 = 7 13 – 5 = 8 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 13 – 9 = 4 14 – 9 = 5 14 – 6 = 8 14 – 7 = 7 14 – 8= 6 17 – 9 = 8 15 – 7 = 8 15 – 9 = 6 15 – 8= 7 16 – 9 = 7 16 – 8= 8 13 – 4 = 9 12 – 3= 9 11 – 2 = 9 14 – 5 = 9 15 – 6 = 9 16 – 7 = 9 17 – 8 =9 18 – 9 = 9 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 9 9 9 9 9 9 9 9 斜着看 被减数和减数同时减（或加） 1 ，差不变 . 观察表格 , 发现规律 12 – 5 = 7 12 – 9 = 3 12 – 6 =6 12 – 7 = 5 12 – 8 = 4 11 – 5 = 6 11 – 6 = 5 11 – 7 = 4 11 – 9 = 2 11 – 8 = 3 11 – 4 = 7 13 – 6 = 7 13 – 7 = 6 13 – 8 = 5 13 – 9 = 4 14 – 9 = 5 14 – 7 = 7 14 – 8= 6 15 – 9 = 6 15 – 8= 7 16 – 9 = 7 11 – 3 = 8 12 – 4 = 8 13 – 5 = 8 14 – 6 = 8 17 – 9 = 8 15 – 7 = 8 16 – 8= 8 13 – 4 = 9 12 – 3= 9 11 – 2 = 9 14 – 5 = 9 15 – 6 = 9 16 – 7 = 9 17 – 8 =9 18 – 9 = 9 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 9 9 9 9 9 9 9 9 斜着看 被减数和减数同时减（或加） 1 ，差不变 . 数学城堡 第一关：开智慧门 11 － 6= （ ） 11 － 7= （ ） 11 － 8= （ ） （ ） － 7=5 （ ） － 7=6 （ ） － 7=7 11 － （ ） =9 12 － （ ） =9 13 － （ ） =9 5 4 3 12 13 14 2 3 4 第二关：搭桥过河 不计算，按得数从小到大排一排 13 — 8 13 — 2 13 — 5 13 — 9 13 — 4 13 — 0 ＜ ＜ ＜ ＜ ＜ 第三关：评选优胜组 比一比哪组红花多？ 根据红花榜上的信息，提出数学问题。 这节复习课你有什么收获呢？ 谢 谢