小学一年级口算练习题20以内.docx
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小学一年级口算练习题20以内
1
3
+
16
=
2
15
+
14
=
3
12
+
11
=
4
16
+
4
=
5
19
-
4
=
6
16
+
0
=
7
20
+
4
=
8
1
+
14
=
9
9
+
8
=
10
5
+
12
=
11
2
+
14
=
12
1
+
14
=
13
10
+
12
=
14
13
+
11
=
15
5
+
18
=
16
15
+
3
=
17
19
+
9
=
18
19
+
1
=
19
17
+
13
=
20
4
+
13
=
21
13
+
17
=
22
20
+
18
=
23
8
+
14
=
24
2
+
14
=
25
11
+
9
=
26
8
+
7
=
27
14
+
15
=
28
9
+
11
=
29
15
+
9
=
30
16
+
15
=
31
14
+
7
=
32
20
-
0
=
33
7
+
17
=
34
9
+
15
=
35
9
+
7
=
36
9
+
15
=
37
11
+
8
=
38
11
+
19
=
39
20
+
15
=
40
5
+
13
=
41
8
+
9
=
42
18
+
6
=
43
18
-
3
=
44
4
+
11
=
45
1
+
18
=
46
19
+
2
=
47
4
+
11
=
48
7
+
20
=
49
18
+
3
=
50
11
+
19
=
12
+
7
=
1
20
+
14
=
2
15
+
8
=
3
7
+
19
=
4
10
+
18
=
5
17
+
12
=
6
1
+
14
=
7
16
+
18
=
8
2
+
14
=
9
4
+
19
=
10
13
+
11
=
11
8
+
10
=
12
3
+
17
=
13
14
+
7
=
14
8
+
15
=
15
13
+
17
=
16
12
+
16
=
17
18
+
13
=
18
8
+
12
=
19
19
+
18
=
20
13
+
2
=
21
18
+
10
=
22
16
+
11
=
23
5
+
10
=
24
12
+
19
=
25
15
+
18
=
26
13
+
9
=
27
12
+
16
=
28
8
+
20
=
29
15
+
2
=
30
3
+
19
=
31
17
+
13
=
32
20
+
13
=
33
17
+
6
=
34
1
+
15
=
35
10
+
17
=
36
8
+
15
=
37
20
-
2
=
38
19
+
0
=
39
8
+
16
=
40
13
+
15
=
41
15
+
14
=
42
15
+
5
=
43
10
+
12
=
44
16
+
20
=
45
8
+
11
=
46
12
+
12
=
47
19
+
0
=
48
8
+
18
=
49
17
+
7
=
50
12
+
19
=
16
+
5
=
1
18
+
20
=
2
20
+
0
=
3
1
+
19
=
4
2
+
18
=
5
8
+
12
=
6
4
+
19
=
7
12
+
9
=
8
8
+
12
=
9
15
+
12
=
10
13
+
17
=
11
17
+
5
=
12
11
+
20
=
13
18
+
4
=
14
20
+
7
=
15
13
+
14
=
16
8
+
17
=
17
15
+
19
=
18
8
+
9
=
19
16
+
11
=
20
15
+
12
=
21
16
+
2
=
22
16
+
16
=
23
13
+
10
=
24
14
+
7
=
25
13
+
2
=
26
18
+
10
=
27
9
+
15
=
28
16
-
0
=
29
6
+
12
=
30
17
+
18
=
31
8
+
19
=
32
16
+
7
=
33
17
-
0
=
34
11
+
7
=
35
9
+
13
=
36
4
+
17
=
37
16
+
20
=
38
13
+
10
=
39
17
-
0
=
40
8
+
10
=
41
10
+
20
=
42
14
+
16
=
43
18
+
13
=
44
15
+
2
=
45
13
+
2
=
46
18
+
3
=
47
3
+
14
=
48
19
+
17
=
49
17
+
12
=
50
10
+
6
=
8
+
15
=
1
14
+
20
=
2
13
+
10
=
3
18
+
11
=
4
16
-
0
=
5
18
+
17
=
6
20
+
4
=
7
16
+
0
=
8
15
+
16
=
9
11
+
14
=
10
6
+
9
=
11
16
+
12
=
12
18
+
8
=
13
1
+
15
=
14
10
+
16
=
15
17
+
0
=
16
18
+
12
=
17
20
+
11
=
18
16
+
11
=
19
17
+
1
=
20
15
-
0
=
21
16
+
0
=
22
12
+
6
=
23
17
+
5
=
24
19
+
12
=
25
6
+
16
=
26
18
+
6
=
27
16
+
3
=
28
20
-
5
=
29
19
+
6
=
30
1
+
15
=
31
6
+
15
=
32
2
+
13
=
33
19
+
9
=
34
16
+
3
=
35
14
+
20
=
36
13
+
19
=
37
16
+
1
=
38
9
+
14
=
39
12
+
19
=
40
11
+
14
=
41
13
+
12
=
42
17
-
0
=
43
4
+
18
=
44
7
+
14
=
45
15
+
1
=
46
13
+
12
=
47
6
+
18
=
48
3
+
20
=
49
12
+
12
=
50
0
+
18
=
17
+
12
=
1
18
+
18
=
2
19
+
7
=
3
19
+
11
=
4
19
-
3
=
5
11
+
6
=
6
20
+
19
=
7
7
+
9
=
8
13
+
19
=
9
10
+
16
=
10
15
+
4
=
11
11
+
17
=
12
19
+
6
=
13
14
+
15
=
14
9
+
14
=
15
11
+
11
=
16
9
+
15
=
17
7
+
10
=
18
19
-
3
=
19
20
+
11
=
20
3
+
20
=
21
3
+
20
=
22
0
+
18
=
23
19
+
8
=
24
18
+
8
=
25
13
+
6
=
26
19
+
4
=
27
16
-
1
=
28
11
+
16
=
29
10
+
14
=
30
16
+
13
=
31
18
-
0
=
32
20
+
20
=
33
2
+
17
=
34
5
+
18
=
35
16
+
2
=
36
20
+
10
=
37
20
+
17
=
38
6
+
13
=
39
16
+
13
=
40
10
+
10
=
41
3
+
20
=
42
18
+
10
=
43
16
+
2
=
44
18
+
13
=
45
7
+
9
=
46
19
+
16
=
47
7
+
17
=
48
13
+
3
=
49
3
+
12
=
50
12
+
11
=
19
+
14
=
1
18
+
20
=
2
12
+
3
=
3
10
+
9
=
4
7
+
17
=
5
17
+
12
=
6
19
-
0
=
7
17
+
15
=
8
6
+
14
=
9
12
+
11
=
10
19
+
14
=
11
4
+
18
=
12
13
+
15
=
13
14
+
11
=
14
13
+
2
=
15
19
+
9
=
16
10
+
14
=
17
2
+
16
=
18
14
+
4
=
19
17
-
1
=
20
20
+
12
=
21
13
+
8
=
22
8
+
11
=
23
10
+
13
=
24
13
+
10
=
25
12
+
10
=
26
13
+
4
=
27
13
+
20
=
28
17
+
13
=
29
2
+
15
=
30
16
+
8
=
31
4
+
14
=
32
15
+
1
=
33
5
+
19
=
34
7
+
20
=
35
19
+
10
=
36
17
+
4
=
37
15
+
8
=
38
1
+
16
=
39
1
+
20
=
40
8
+
15
=
41
13
+
19
=
42
14
+
18
=
43
7
+
14
=
44
8
+
12
=
45
8
+
15
=
46
19
-
2
=
47
20
+
11
=
48
8
+
12
=
49
12
+
20
=
50
17
-
0
=
13
+
9
=
1
12
+
=
28
2
8
+
=
28
3
15
+
=
17
4
3
+
=
22
5
17
+
=
30
6
20
+
=
33
7
17
+
=
23
8
1
+
=
16
9
10
+
=
27
10
8
+
=
23
11
20
-
=
18
12
19
+
=
19
13
8
+
=
24
14
13
+
=
28
15
15
+
=
29
16
15
+
=
20
17
10
+
=
22
18
16
+
=
36
19
8
+
=
19
20
12
+
=
24
21
19
+
=
19
22
8
+
=
26
23
17
+
=
24
24
12
+
=
31
25
16
+
=
21
26
18
+
=
38
27
20
+
=
20
28
1
+
=
20
29
2
+
=
20
30
8
+
=
20
31
4
+
=
23
32
12
+
=
21
33
8
+
=
20
34
15
+
=
27
35
13
+
=
30
36
17
+
=
22
37
11
+
=
31
38
18
+
=
22
39
20
+
=
27
40
13
+
=
27
41
8
+
=
25
42
15
+
=
34
43
8
+
=
17
44
16
+
=
27
45
15
+
=
27
46
16
+
=
18
47
16
+
=
32
48
13
+
=
23
49
14
+
=
21
50
13
+
=
15
18
+
=
28
1
9
+
=
24
2
16
-
=
16
3
6
+
=
18
4
17
+
=
35
5
8
+
=
27
6
16
+
=
23
7
17
-
=
17
8
11
+
=
18
9
9
+
=
22
10
4
+
=
21
11
16
+
=
36
12
13
+
=
23
13
17
-
=
17
14
8
+
=
18
15
10
+
=
30
16
14
+
=
30
17
18
+
=
31
18
15
+
=
17
19
13
+
=
15
20
18
+
=
21
21
3
+
=
17
22
19
+
=
36
23
17
+
=
29
24
10
+
=
16
25
8
+
=
23
26
14
+
=
34
27
13
+
=
23
28
18
+
=
29
29
16
-
=
16
30
18
+
=
35
31
20
+
=
24
32
16
+
=
16
33
15
+
=
31
34
11
+
=
25
35
6
+
=
15
36
16
+
=
28
37
18
+
=
26
38
1
+
=
16
39
10
+
=
26
40
17
+
=
17
41
18
+
=
30
42
20
+
=
31
43
16
+
=
27
44
17
+
=
18
45
15
-
=
15
46
16
+
=
16
47
12
+
=
18
48
17
+
=
22
49
19
+
=
31
50
6
+
=
22
18
+
=
24
1
16
+
=
19
2
20
-
=
15
3
19
+
=
25
4
1
+
=
16
5
6
+
=
21
6
2
+
=
15
7
19
+
=
28
8
16
+
=
19
9
14
+
=
34
10
13
+
=
32
11
16
+
=
17
12
9
+
=
23
13
12
+
=
31
14
11
+
=
25
15
13
+
=
25
16
17
-
=
17
17
4
+
=
22
18
7
+
=
21
19
15
+
=
16
20
13
+
=
25
21
6
+
=
24
22
3
+
=
23
23
12
+
=
24
24
0
+
=
18
25
17
+
=
29
26
18
+
=
36
27
19
+
=
26
28
19
+
=
30
29
19
-
=
16
30
11
+
=
17
31
20
+
=
39
32
7
+
=
16
33
13
+
=
32
34
10
+
=
26
35
15
+
=
19
36
11
+
=
28
37
19
+
=
25
38
14
+
=
29
39
9
+
=
23
40
11
+
=
22
41
9
+
=
24
42
7
+
=
17
43
19
-
=
16
44
20
+
=
31
45
3
+
=
23
46
3
+
=
23
47
0
+
=
18
48
19
+
=
27
49
18
+
=
26
50
13
+
=
19
19
+
=
23
1
16
-
=
15
2
11
+
=
27
3
10
+
=
24
4
16
+
=
29
5
18
-
=
18
6
20
+
=
40
7
2
+
=
19
8
5
+
=
23
9
16
+
=
18
10
20
+
=
30
11
20
+
=
37
12
6
+
=
19
13
16
+
=
29
14
10
+
=
20
15
3
+
=
23
16
18
+
=
28
17
16
+
=
18
18
18
+
=
31
19
7
+
=
16
20
19
+
=
35
21
7
+
=
24
22
13
+
=
16
23
3
+
=
15
24
12
+
=
23
25
19
+
=
33
26
18
+
=
38
27
12
+
=
15
28
10
+
=
19
29
7
+
=
24
30
17
+
=
29
31
19
-
=
19
32
17
+
=
32
33
6
+
=
20
34
12
+
=
23
35
19
+
=
33
36
4
+
=
22
37
13
+
=
28
38
14
+
=
25
39
13
+
=
15
40
19
+
=
28
41
10
+
=
24
升级会员 