50以内减法练习题300道含答案.docx
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50以内减法练习题300道含答案
50以内减法练习题（300道）
2
+
17
=
11
+
2
=
1
+
7
=
8
+
6
=
15
+
18
=
23
+
9
=
19
+
22
=
14
+
30
=
24
+
11
=
21
+
29
=
21
+
6
=
11
+
10
=
12
+
26
=
28
+
4
=
11
+
21
=
6
+
28
=
29
+
3
=
10
+
11
=
2
+
7
=
16
+
28
=
13
+
22
=
13
+
16
=
15
+
19
=
25
+
6
=
22
+
16
=
22
+
29
=
17
+
2
=
19
+
26
=
19
+
10
=
14
+
30
=
11
+
20
=
13
+
28
=
24
+
27
=
22
+
23
=
2
+
16
=
18
+
19
=
24
+
11
=
16
+
30
=
28
+
9
=
19
+
6
=
3
+
2
=
7
+
2
=
2
+
8
=
11
+
2
=
17
+
30
=
25
+
29
=
25
+
25
=
4
+
19
=
19
+
18
=
30
+
14
=
21
+
11
=
2
+
26
=
21
+
4
=
27
+
2
=
18
+
20
=
21
+
28
=
16
+
28
=
6
+
21
=
1
+
8
=
21
+
15
=
20
+
11
=
9
+
6
=
4
+
3
=
3
+
5
=
10
+
4
=
15
+
26
=
27
+
3
=
19
+
20
=
10
+
1
=
23
+
11
=
7
+
11
=
1
+
8
=
15
+
23
=
2
+
12
=
10
+
2
=
23
+
23
=
4
+
6
=
14
+
23
=
7
+
13
=
12
+
16
=
21
+
5
=
30
+
10
=
1
+
8
=
3
+
19
=
29
+
7
=
21
+
8
=
12
+
14
=
21
+
24
=
12
+
3
=
16
+
3
=
5
+
17
=
22
+
24
=
25
+
13
=
14
+
3
=
17
+
29
=
28
+
12
=
16
+
5
=
30
+
22
=
27
+
13
=
9
+
16
=
6
+
6
=
27
+
19
=
2
+
12
=
21
+
21
=
21
+
4
=
13
+
10
=
26
+
11
=
26
+
8
=
25
+
1
=
23
+
13
=
8
+
23
=
25
+
12
=
6
+
23
=
15
+
24
=
11
+
30
=
3
+
22
=
19
+
12
=
6
+
5
=
11
+
12
=
2
+
26
=
27
+
21
=
3
+
2
=
17
+
17
=
19
+
24
=
15
+
29
=
5
+
16
=
30
+
22
=
10
+
28
=
13
+
14
=
14
+
29
=
30
+
22
=
7
+
15
=
22
+
17
=
29
+
23
=
8
+
24
=
14
+
15
=
2
+
19
=
10
+
7
=
15
+
6
=
18
+
18
=
20
+
1
=
10
+
26
=
23
+
19
=
25
+
5
=
12
+
13
=
7
+
8
=
11
+
14
=
27
+
15
=
16
+
9
=
13
+
22
=
30
+
25
=
27
+
1
=
22
+
24
=
29
+
12
=
29
+
13
=
23
+
1
=
30
+
7
=
23
+
26
=
30
+
20
=
29
+
17
=
17
+
28
=
26
+
10
=
23
+
28
=
24
+
26
=
15
+
29
=
25
+
1
=
19
+
20
=
18
+
1
=
24
+
20
=
24
+
20
=
12
+
10
=
14
+
5
=
24
+
29
=
17
+
30
=
5
+
14
=
20
+
26
=
18
+
20
=
20
+
13
=
28
+
23
=
26
+
25
=
27
+
16
=
3
+
6
=
13
+
3
=
21
+
18
=
16
+
1
=
17
+
9
=
3
+
1
=
16
+
29
=
15
+
6
=
12
+
29
=
27
+
25
=
24
+
6
=
10
+
6
=
10
+
2
=
1
+
8
=
23
+
16
=
16
+
12
=
15
+
22
=
18
+
25
=
16
+
26
=
16
+
27
=
26
+
26
=
4
+
30
=
17
+
15
=
10
+
25
=
14
+
25
=
9
+
4
=
4
+
19
=
5
+
2
=
11
+
24
=
29
+
9
=
10
+
6
=
7
+
5
=
11
+
10
=
30
+
21
=
15
+
17
=
23
+
21
=
27
+
19
=
15
+
22
=
11
+
28
=
12
+
24
=
25
+
16
=
29
+
14
=
6
+
17
=
16
+
21
=
5
+
17
=
28
+
14
=
1
+
22
=
8
+
10
=
8
+
21
=
6
+
6
=
21
+
1
=
17
+
13
=
4
+
27
=
28
+
16
=
23
+
1
=
25
+
4
=
16
+
1
=
1
+
26
=
8
+
16
=
5
+
5
=
25
+
26
=
15
+
3
=
26
+
20
=
11
+
7
=
26
+
14
=
24
+
24
=
24
+
2
=
22
+
24
=
12
+
22
=
17
+
9
=
12
+
13
=
10
+
7
=
26
+
6
=
20
+
21
=
20
+
7
=
2
+
19
=
28
+
24
=
17
+
12
=
5
+
10
=
11
+
19
=
29
+
21
=
4
+
13
=
17
+
24
=
2
+
22
=
18
+
9
=
22
+
14
=
8
+
15
=
8
+
1
=
20
+
5
=
19
+
26
=
14
+
28
=
24
+
3
=
19
+
10
=
1
+
2
=
7
+
10
=
18
+
5
=
11
+
29
=
7
+
21
=
21
+
11
=
22
+
28
=
7
+
3
=
5
+
4
=
7
+
27
=
14
+
21
=
21
+
11
=
24
+
27
=
8
+
16
=
3
+
12
=
15
+
14
=
15
+
12
=
21
+
10
=
20
+
7
=
10
+
5
=
11
+
15
=
22
+
12
=
23
+
19
=
14
+
19
=
14
+
28
=
26
+
17
=
练习题答案
2
+
17
=
19
11
+
2
=
13
1
+
7
=
8
8
+
6
=
14
15
+
18
=
33
23
+
9
=
32
19
+
22
=
41
14
+
30
=
44
24
+
11
=
35
21
+
29
=
50
21
+
6
=
27
11
+
10
=
21
12
+
26
=
38
28
+
4
=
32
11
+
21
=
32
6
+
28
=
34
29
+
3
=
32
10
+
11
=
21
2
+
7
=
9
16
+
28
=
44
13
+
22
=
35
13
+
16
=
29
15
+
19
=
34
25
+
6
=
31
22
+
16
=
38
22
+
29
=
51
17
+
2
=
19
19
+
26
=
45
19
+
10
=
29
14
+
30
=
44
11
+
20
=
31
13
+
28
=
41
24
+
27
=
51
22
+
23
=
45
2
+
16
=
18
18
+
19
=
37
24
+
11
=
35
16
+
30
=
46
28
+
9
=
37
19
+
6
=
25
3
+
2
=
5
7
+
2
=
9
2
+
8
=
10
11
+
2
=
13
17
+
30
=
47
25
+
29
=
54
25
+
25
=
50
4
+
19
=
23
19
+
18
=
37
30
+
14
=
44
21
+
11
=
32
2
+
26
=
28
21
+
4
=
25
27
+
2
=
29
18
+
20
=
38
21
+
28
=
49
16
+
28
=
44
6
+
21
=
27
1
+
8
=
9
21
+
15
=
36
20
+
11
=
31
9
+
6
=
15
4
+
3
=
7
3
+
5
=
8
10
+
4
=
14
15
+
26
=
41
27
+
3
=
30
19
+
20
=
39
10
+
1
=
11
23
+
11
=
34
7
+
11
=
18
1
+
8
=
9
15
+
23
=
38
2
+
12
=
14
10
+
2
=
12
23
+
23
=
46
4
+
6
=
10
14
+
23
=
37
7
+
13
=
20
12
+
16
=
28
21
+
5
=
26
30
+
10
=
40
1
+
8
=
9
3
+
19
=
22
29
+
7
=
36
21
+
8
=
29
12
+
14
=
26
21
+
24
=
45
12
+
3
=
15
16
+
3
=
19
5
+
17
=
22
22
+
24
=
46
25
+
13
=
38
14
+
3
=
17
17
+
29
=
46
28
+
12
=
40
16
+
5
=
21
30
+
22
=
52
27
+
13
=
40
9
+
16
=
25
6
+
6
=
12
27
+
19
=
46
2
+
12
=
14
21
+
21
=
42
21
+
4
=
25
13
+
10
=
23
26
+
11
=
37
26
+
8
=
34
25
+
1
=
26
23
+
13
=
36
8
+
23
=
31
25
+
12
=
37
6
+
23
=
29
15
+
24
=
39
11
+
30
=
41
3
+
22
=
25
19
+
12
=
31
6
+
5
=
11
11
+
12
=
23
2
+
26
=
28
27
+
21
=
48
3
+
2
=
5
17
+
17
=
34
19
+
24
=
43
15
+
29
=
44
5
+
16
=
21
30
+
22
=
52
10
+
28
=
38
13
+
14
=
27
14
+
29
=
43
30
+
22
=
52
7
+
15
=
22
22
+
17
=
39
29
+
23
=
52
8
+
24
=
32
14
+
15
=
29
2
+
19
=
21
10
+
7
=
17
15
+
6
=
21
18
+
18
=
36
20
+
1
=
21
10
+
26
=
36
23
+
19
=
42
25
+
5
=
30
12
+
13
=
25
7
+
8
=
15
11
+
14
=
25
27
+
15
=
42
16
+
9
=
25
13
+
22
=
35
30
+
25
=
55
27
+
1
=
28
22
+
24
=
46
29
+
12
=
41
29
+
13
=
42
23
+
1
=
24
30
+
7
=
37
23
+
26
=
49
30
+
20
=
50
29
+
17
=
46
17
+
28
=
45
26
+
10
=
36
23
+
28
=
51
24
+
26
=
50
15
+
29
=
44
25
+
1
=
26
19
+
20
=
39
18
+
1
=
19
24
+
20
=
44
24
+
20
=
44
12
+
10
=
22
14
+
5
=
19
24
+
29
=
53
17
+
30
=
47
5
+
14
=
19
20
+
26
=
46
18
+
20
=
38
20
+
13
=
33
28
+
23
=
51
26
+
25
=
51
27
+
16
=
43
3
+
6
=
9
13
+
3
=
16
21
+
18
=
39
16
+
1
=
17
17
+
9
=
26
3
+
1
=
4
16
+
29
=
45
15
+
6
=
21
12
+
29
=
41
27
+
25
=
52
24
+
6
=
30
10
+
6
=
16
10
+
2
=
12
1
+
8
=
9
23
+
16
=
39
16
+
12
=
28
15
+
22
=
37
18
+
25
=
43
16
+
26
=
42
16
+
27
=
43
26
+
26
=
52
4
+
30
=
34
17
+
15
=
32
10
+
25
=
35
14
+
25
=
39
9
+
4
=
13
4
+
19
=
23
5
+
2
=
7
11
+
24
=
35
29
+
9
=
38
10
+
6
=
16
7
+
5
=
12
11
+
10
=
21
30
+
21
=
51
15
+
17
=
32
23
+
21
=
44
27
+
19
=
46
15
+
22
=
37
11
+
28
=
39
12
+
24
=
36
25
+
16
=
41
29
+
14
=
43
6
+
17
=
23
16
+
21
=
37
5
+
17
=
22
28
+
14
=
42
1
+
22
=
23
8
+
10
=
18
8
+
21
=
29
6
+
6
=
12
21
+
1
=
22
17
+
13
=
30
4
+
27
=
31
28
+
16
=
44
23
+
1
=
24
25
+
4
=
29
16
+
1
=
17
1
+
26
=
27
8
+
16
=
24
5
+
5
=
10
升级会员 