20以内的加减法口诀表以及练习题分析
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2021年01月25日 17:41
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小学美术教学设计-
20
以内加法口诀
9+2=11
9+3=12
9+4=13
9+5=14
9+6=15
9+7=16
9+8=17
9+9=18
8+3=11
8+4=12
8+5=13
8+6=14
8+7=15
8+8=16
8+9=17
7+4=11
7+5=12
7+6=13
7+7=14
7+8=15
7+9=16
6+5=11
6+6=12
6+7=13
6+8=14
6+9=15
5+6=11
5+7=12
5+8=13
5+9=14
4+7=11
4+8=12
4+9=13
3+8=11
3+9=12
2+9=11
20
以内
(
十几加几
)
加法口诀
(
十几加几(不进位),十位照写,个位与个位相加
)
1+11=12
2+11=13
3+11=14
4+11=15
5+11=16
6+11=17
7+11=18
8+11=19
9+11=20
1+12=13
2+12=14
3+12=15
4+12=16
5+12=17
6+12=18
7+12=19
8+12=20
1+13=14
2+13=15
3+13=16
4+13=17
5+13=18
6+13=19
7+13=20
1+14=15
2+14=16
3+14=17
4+14=18
5+14=19
6+14=20
1+15=16
2+15=17
3+15=18
4+15=19
5+15=20
1+16=17
2+16=18
3+16=19
4+16=20
1+17=18
2+17=19
3+17=20
1+18=19
2+18=20
1+19=20
练习题
18
-
5
=
17
-
11
=
13
+
6
=
17
-
5
=
16
-
10
=
5
-
4
=
9
-
4
=
16
-
1
=
7
+
10
=
9
-
0
=
18
+
1
=
6
+
10
=
4
-
0
=
18
-
12
=
17
-
17
=
10
+
2
=
10
-
10
=
0
+
16
=
13
+
4
=
3
+
12
=
2
+
14
=
14
-
3
=
12
-
0
=
3
+
5
=
11
+
1
=
9
-
0
=
2
+
2
=
6
-
5
=
0
+
0
=
11
-
10
=
11
-
1
=
11
+
0
=
10
+
7
=
17
-
1
=
3
+
4
=
12
+
5
=
15
-
3
=
12
+
3
=
2
+
6
=
10
+
7
=
9
-
9
=
16
-
1
=
15
-
3
=
15
-
0
=
13
-
12
=
15
-
13
=
0
+
17
=
11
+
4
=
3
-
1
=
13
-
10
=
0
+
1
=
16
+
2
=
1
+
14
=
14
+
1
=
9
-
8
=
17
-
12
=
19
-
5
=
1
+
12
=
4
+
12
=
19
-
13
=
6
-
5
=
4
+
1
=
4
+
12
=
14
+
1
=
7
-
2
=
10
+
4
=
13
-
2
=
15
+
4
=
19
-
14
=
16
-
4
=
14
+
2
=
10
+
8
=
11
+
5
=
1
+
17
=
7
-
3
=
11
+
1
=
11
+
2
=
4
-
3
=
13
+
1
=
4
+
12
=
17
-
15
=
16
+
1
=
11
+
5
=
12
+
4
=
17
-
10
=
13
+
2
=
1
+
14
=
11
+
1
=
19
-
1
=
2
+
6
=
19
-
18
=
2
+
11
=
2
+
6
=
18
-
13
=
12
+
7
=
3
+
1
=
3
+
4
=
16
-
14
=
18
-
2
=
5
+
4
=
16
+
2
=
16
-
4
=
11
+
1
=
17
-
1
=
2
-
2
=
13
-
3
=
18
-
11
=
6
-
3
=
7
-
1
=
11
-
10
=
0
+
11
=
17
-
13
=
19
-
5
=
12
-
11
=
16
-
16
=
18
-
11
=
7
-
3
=
8
-
6
=
17
+
0
=
13
+
1
=
0
+
10
=
11
+
3
=
5
+
10
=
2
+
2
=
10
+
1
=
3
+
3
=
1
+
8
=
18
-
7
=
6
-
0
=
0
+
18
=
2
-
2
=
5
+
14
=
6
-
1
=
5
+
10
=
5
-
5
=
3
+
11
=
2
+
15
=
18
-
4
=
1
+
13
=
0
+
19
=
7
+
11
=
10
+
3
=
1
+
7
=
11
+
0
=
2
+
6
=
-
10
=
19
-
11
=
10
+
3
=
19
-
5
=
19
-
10
=
14
-
4
=
12
+
1
=
12
15
-
11
=
12
+
3
=
18
-
13
=
6
-
0
=
1
+
7
=
18
-
16
=
18
-
6
=
9
-
1
=
6
-
3
=
13
-
1
=
19
-
15
=
8
-
0
=
6
-
6
=
0
+
19
=
9
-
2
=
3
-
3
=
12
+
3
=
2
+
11
=
7
-
3
=
13
-
2
=
8
-
0
=
2
+
4
=
17
-
10
=
2
+
14
=
17
-
2
=
0
+
1
=
12
-
11
=
14
+
5
=
12
+
4
=
6
+
10
=
6
+
12
=
17
-
14
=
5
-
3
=
4
-
3
=
13
-
1
=
1
+
10
=
15
+
1
=
1
+
5
=
19
-
17
=
1
+
15
=
5
+
13
=
2
+
3
=
18
-
12
=
4
+
11
=
19
-
1
=
17
-
11
=
17
-
16
=
12
-
10
=
11
+
1
=
19
-
19
=
3
+
1
=
15
-
3
=
7
+
10
=
19
-
7
=
15
+
3
=
3
+
6
=
7
-
6
=
15
+
1
=
14
+
0
=
18
-
8
=
12
+
7
=
14
+
1
=
5
+
3
=
18
-
1
=
5
+
10
=
19
-
17
=
4
+
3
=
4
-
2
=
7
-
1
=
15
-
10
=
8
-
4
=
18
-
15
=
2
-
1
=
3
+
6
=
13
+
0
=
0
+
1
=
3
+
13
=
3
+
12
=
17
-
11
=
2
+
3
=
3
+
6
=
4
+
5
=
7
+
1
=
1
+
7
=
12
+
2
=
18
-
6
=
6
-
2
=
1
+
7
=
3
-
2
=
18
-
3
=
16
-
14
=
1
+
18
=
13
-
0
=
15
-
0
=
19
-
19
=
17
+
0
=
16
-
4
=
2
-
2
=
12
-
12
=
19
-
4
=
11
+
2
=
3
+
15
=
3
-
0
=
0
+
9
=
4
+
10
=
0
+
11
=
4
-
0
=
4
-
3
=
17
+
2
=
1
+
7
=
18
-
8
=
11
-
10
=
15
-
12
=
4
+
3
=
8
-
4
=
10
+
2
=
13
-
3
=
15
-
1
=
16
+
2
=
1
+
2
=
17
-
16
=
18
-
17
=
6
-
5
=
16
+
1
=
0
+
5
=
16
+
1
=
10
+
8
=
3
-
0
=
12
-
10
=
15
-
11
=
3
+
14
=
6
-
2
=
7
-
4
=
1
+
12
=
16
-
2
=
10
+
7
=
14
+
3
=
1
+
2
=
12
+
3
=
6
+
2
=
4
+
15
=
9
-
0
=
12
-
10
=
5
+
2
=
0
-
0
=
7
-
3
=
6
+
10
=
2
+
13
=
15
+
1
=
15
-
11
=
4
+
15
=
10
+
3
=
2
+
5
=
11
+
8
=
5
+
14
=
17
-
15
=
16
+
3
=
2
+
3
=
19
-
18
=
9
-
1
=
17
-
6
=
19
-
1
=
12
-
11
=
1
+
13
=
18
-
2
=
19
-
7
=
8
+
10
=
2
+
4
=
1
+
14
=
2
+
6
=
1
+
1
=
12
+
4
=
6
-
1
=
1
+
14
=
18
-
13
=