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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
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