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20以内加减法竞赛作业训练题
姓名:班级:日期:用时:分钟得分:
45
×
21
=
69
×
95
=
76
×
31
=
16
×
50
=
85
×
60
=
4
5
6
9
7
6
1
6
8
5
×
2
1
×
9
5
×
3
1
×
5
0
×
6
0
95
×
56
=
71
×
66
=
50
×
42
=
95
×
89
=
51
×
34
=
9
5
7
1
5
0
9
5
5
1
×
5
6
×
6
6
×
4
2
×
8
9
×
3
4
76
×
31
=
47
×
90
=
51
×
23
=
17
×
48
=
32
×
37
=
7
6
4
7
5
1
1
7
3
2
×
3
1
×
9
0
×
2
3
×
4
8
×
3
7
98
×
70
=
42
×
69
=
15
×
16
=
78
×
46
=
39
×
23
=
9
8
4
2
1
5
7
8
3
9
×
7
0
×
6
9
×
1
6
×
4
6
×
2
3
13
×
59
=
88
×
85
=
43
×
39
=
20
×
33
=
90
×
73
=
1
3
8
8
4
3
2
0
9
0
×
5
9
×
8
5
×
3
9
×
3
3
×
7
3
89
×
67
=
89
×
23
=
47
×
61
=
54
×
21
=
46
×
72
=
8
9
8
9
4
7
5
4
4
6
×
6
7
×
2
3
×
6
1
×
2
1
×
7
2
11
×
68
=
95
×
78
=
55
×
65
=
79
×
24
=
50
×
53
=
1
1
9
5
5
5
7
9
5
0
×
6
8
×
7
8
×
6
5
×
2
4
×
5
3
48
×
73
=
17
×
96
=
85
×
62
=
37
×
65
=
38
×
14
=
4
8
1
7
8
5
3
7
3
8
×
7
3
×
9
6
×
6
2
×
6
5
×
1
4
66
×
82
=
40
×
89
=
85
×
95
=
94
×
89
=
66
×
99
=
6
6
4
0
8
5
9
4
6
6
×
8
2
×
8
9
×
9
5
×
8
9
×
9
9
98
×
87
=
18
×
19
=
20
×
89
=
24
×
53
=
14
×
69
=
9
8
1
8
2
0
2
4
1
4
×
8
7
×
1
9
×
8
9
×
5
3
×
6
9
23
×
24
=
58
×
11
=
78
×
95
=
84
×
60
=
43
×
73
=
2
3
5
8
7
8
8
4
4
3
×
2
4
×
1
1
×
9
5
×
6
0
×
7
3
26
×
47
=
46
×
31
=
62
×
39
=
31
×
39
=
56
×
60
=
2
6
4
6
6
2
3
1
5
6
×
4
7
×
3
1
×
3
9
×
3
9
×
6
0
30
×
69
=
33
×
34
=
25
×
21
=
56
×
35
=
20
×
42
=
3
0
3
3
2
5
5
6
2
0
×
6
9
×
3
4
×
2
1
×
3
5
×
4
2
53
×
84
=
20
×
10
=
75
×
70
=
97
×
30
=
97
×
29
=
5
3
2
0
7
5
9
7
9
7
×
8
4
×
1
0
×
7
0
×
3
0
×
2
9
85
×
72
=
17
×
30
=
77
×
53
=
54
×
77
=
49
×
59
=
8
5
1
7
7
7
5
4
4
9
×
7
2
×
3
0
×
5
3
×
7
7
×
5
9
50
×
28
=
50
×
51
=
71
×
28
=
97
×
54
=
12
×
67
=
5
0
5
0
7
1
9
7
1
2
×
2
8
×
5
1
×
2
8
×
5
4
×
6
7
81
×
82
=
46
×
80
=
31
×
53
=
61
×
78
=
66
×
72
=
8
1
4
6
3
1
6
1
6
6
×
8
2
×
8
0
×
5
3
×
7
8
×
7
2
24
×
68
=
34
×
84
=
97
×
83
=
52
×
79
=
85
×
26
=
2
4
3
4
9
7
5
2
8
5
×
6
8
×
8
4
×
8
3
×
7
9
×
2
6
26
×
45
=
31
×
69
=
47
×
64
=
15
×
16
=
41
×
77
=
2
6
3
1
4
7
1
5
4
1
×
4
5
×
6
9
×
6
4
×
1
6
×
7
7
30
×
53
=
15
×
78
=
36
×
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