20以内乘法练习.docx
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20以内乘法练习
20以乘法练习
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9
×
19
=
171
19
×
19
=
361
14
×
1
=
14
15
×
1
=
15
15
×
8
=
120
6
×
13
=
78
1
×
17
=
17
12
×
5
=
60
5
×
9
=
45
20
×
4
=
80
19
×
17
=
323
14
×
1
=
14
11
×
18
=
198
10
×
16
=
160
8
×
9
=
72
5
×
16
=
80
13
×
2
=
26
2
×
4
=
8
19
×
1
=
19
20
×
13
=
260
18
×
14
=
252
9
×
19
=
171
11
×
1
=
11
7
×
20
=
140
10
×
1
=
10
7
×
14
=
98
18
×
6
=
108
2
×
12
=
24
12
×
11
=
132
17
×
15
=
255
20
×
11
=
220
2
×
6
=
12
9
×
7
=
63
16
×
11
=
176
6
×
14
=
84
14
×
15
=
210
2
×
6
=
12
16
×
13
=
208
12
×
7
=
84
5
×
7
=
35
9
×
15
=
135
8
×
13
=
104
5
×
9
=
45
5
×
8
=
40
18
×
4
=
72
14
×
17
=
238
20
×
19
=
380
9
×
20
=
180
19
×
5
=
95
6
×
10
=
60
6
×
18
=
108
16
×
2
=
32
10
×
16
=
160
20
×
5
=
100
11
×
8
=
88
4
×
1
=
4
12
×
10
=
120
4
×
14
=
56
9
×
3
=
27
13
×
12
=
156
7
×
6
=
42
15
×
10
=
150
19
×
7
=
133
15
×
20
=
300
15
×
14
=
210
9
×
4
=
36
1
×
4
=
4
11
×
13
=
143
15
×
17
=
255
18
×
11
=
198
11
×
3
=
33
14
×
11
=
154
15
×
4
=
60
19
×
11
=
209
4
×
19
=
76
17
×
1
=
17
2
×
11
=
22
15
×
7
=
105
12
×
12
=
144
5
×
17
=
85
15
×
3
=
45
6
×
18
=
108
9
×
12
=
108
4
×
16
=
64
12
×
18
=
216
13
×
11
=
143
15
×
8
=
120
6
×
14
=
84
13
×
14
=
182
17
×
16
=
272
6
×
20
=
120
7
×
3
=
21
20
×
1
=
20
20
×
14
=
280
18
×
1
=
18
7
×
17
=
119
1
×
17
=
17
4
×
2
=
8
1
×
4
=
4
11
×
18
=
198
18
×
8
=
144
19
×
18
=
342
19
×
13
=
247
1
×
1
=
1
17
×
15
=
255
7
×
20
=
140
5
×
3
=
15
18
×
1
=
18
11
×
7
=
77
12
×
9
=
108
19
×
20
=
380
2
×
3
=
6
11
×
9
=
99
11
×
2
=
22
14
×
18
=
252
9
×
18
=
162
13
×
18
=
234
19
×
17
=
323
17
×
19
=
323
2
×
17
=
34
1
×
16
=
16
8
×
6
=
48
11
×
19
=
209
6
×
1
=
6
16
×
19
=
304
2
×
13
=
26
11
×
3
=
33
6
×
11
=
66
10
×
19
=
190
7
×
11
=
77
13
×
13
=
169
16
×
13
=
208
18
×
13
=
234
15
×
6
=
90
16
×
17
=
272
12
×
2
=
24
17
×
6
=
102
10
×
5
=
50
5
×
9
=
45
14
×
13
=
182
16
×
15
=
240
19
×
20
=
380
20
×
12
=
240
19
×
3
=
57
16
×
1
=
16
2
×
10
=
20
20
×
16
=
320
12
×
11
=
132
13
×
4
=
52
5
×
15
=
75
8
×
13
=
104
16
×
8
=
128
3
×
16
=
48
4
×
5
=
20
11
×
6
=
66
8
×
6
=
48
1
×
12
=
12
10
×
3
=
30
20
×
16
=
320
11
×
10
=
110
1
×
9
=
9
1
×
8
=
8
15
×
17
=
255
19
×
3
=
57
10
×
15
=
150
3
×
3
=
9
8
×
14
=
112
10
×
4
=
40
9
×
20
=
180
8
×
3
=
24
11
×
12
=
132
15
×
9
=
135
4
×
3
=
12
15
×
5
=
75
2
×
12
=
24
18
×
18
=
324
10
×
14
=
140
6
×
10
=
60
10
×
18
=
180
7
×
4
=
28
1
×
6
=
6
10
×
6
=
60
19
×
4
=
76
18
×
4
=
72
19
×
17
=
323
9
×
5
=
45
3
×
14
=
42
17
×
6
=
102
12
×
16
=
192
7
×
2
=
14
6
×
12
=
72
14
×
18
=
252
6
×
8
=
48
19
×
8
=
152
20
×
2
=
40
15
×
4
=
60
14
×
16
=
224
11
×
15
=
165
16
×
10
=
160
2
×
15
=
30
4
×
17
=
68
5
×
18
=
90
17
×
16
=
272
3
×
11
=
33
4
×
10
=
40
10
×
15
=
150
18
×
15
=
270
14
×
14
=
196
3
×
7
=
21
11
×
1
=
11
10
×
14
=
140
1
×
19
=
19
5
×
7
=
35
2
×
13
=
26
19
×
12
=
228
15
×
8
=
120
13
×
1
=
13
13
×
8
=
104
5
×
2
=
10
12
×
1
=
12
9
×
9
=
81
14
×
3
=
42
8
×
11
=
88
7
×
5
=
35
14
×
9
=
126
10
×
11
=
110
11
×
9
=
99
3
×
4
=
12
11
×
4
=
44
18
×
1
=
18
7
×
16
=
112
1
×
5
=
5
3
×
2
=
6
11
×
13
=
143
7
×
18
=
126
2
×
7
=
14
18
×
18
=
324
4
×
7
=
28
1
×
9
=
9
14
×
11
=
154
12
×
20
=
240
7
×
18
=
126
20
×
7
=
140
15
×
3
=
45
1
×
17
=
17
6
×
13
=
78
14
×
15
=
210
18
×
1
=
18
20
×
2
=
40
6
×
17
=
102
3
×
3
=
9
5
×
10
=
50
17
×
19
=
323
18
×
4
=
72
17
×
19
=
323
18
×
5
=
90
1
×
4
=
4
10
×
4
=
40
9
×
20
=
180
12
×
8
=
96
16
×
19
=
304
13
×
12
=
156
16
×
3
=
48
12
×
12
=
144
3
×
7
=
21
13
×
4
=
52
9
×
4
=
36
17
×
19
=
323
6
×
18
=
108
8
×
15
=
120
11
×
10
=
110
20
×
6
=
120
6
×
4
=
24
16
×
19
=
304
3
×
17
=
51
18
×
8
=
144
12
×
16
=
192
6
×
16
=
96
4
×
8
=
32
5
×
8
=
40
7
×
4
=
28
3
×
6
=
18
1
×
13
=
13
19
×
15
=
285
15
×
8
=
120
8
×
14
=
112
10
×
3
=
30
3
×
17
=
51
2
×
3
=
6
12
×
12
=
144
7
×
5
=
35
4
×
20
=
80
16
×
15
=
240
2
×
18
=
36
6
×
2
=
12
6
×
18
=
108
20
×
13
=
260
9
×
11
=
99
1
×
19
=
19
12
×
14
=
168
19
×
18
=
342
5
×
6
=
30
10
×
11
=
110
19
×
18
=
342
18
×
13
=
234
4
×
6
=
24
1
×
5
=
5
19
×
4
=
76
1
×
8
=
8
7
×
18
=
126
1
×
19
=
19
11
×
12
=
132
17
×
6
=
102
20
×
8
=
160
8
×
19
=
152
16
×
11
=
176
2
×
15
=
30
18
×
3
=
54
5
×
6
=
30
20
×
2
=
40
9
×
7
=
63
2
×
19
=
38
9
×
19
=
171
20
×
2
=
40
20
×
5
=
100
15
×
10
=
150
12
×
15
=
180
1
×
2
=
2
10
×
9
=
90
9
×
17
=
153
19
×
3
=
57
8
×
19
=
152
8
×
20
=
160
19
×
4
=
76
4
×
6
=
24
12
×
17
=
204
5
×
18
=
90
8
×
15
=
120
8
×
3
=
24
3
×
18
=
54
20
×
6
=
120
4
×
5
=
20
17
×
13
=
221
14
×
8
=
112
18
×
2
=
36
20
×
12
=
240
10
×
9
=
90
10
×
13
=
130
5
×
8
=
40
14
×
9
=
126
18
×
20
=
360
8
×
20
=
160
14
×
2
=
28
5
×
14
=
70
9
×
19
=
171
10
×
20
=
200
6
×
19
=
114
7
×
15
=
105
8
×
18
=
144
16
×
3
=
48
7
×
2
=
14
19
×
15
=
285
16
×
18
=
288
6
×
1
=
6
19
×
19
=
361
1
×
18
=
18
1
×
11
=
11
16
×
12
=
192
11
×
17
=
187
9
×
18
=
162
20
×
7
=
140
5
×
19
=
95
7
×
3
=
21
4
×
2
=
8
9
×
5
=
45
18
×
19
=
342
3
×
15
=
45
3
×
8
=
24
6
×
10
=
60
13
×
17
=
221
19
×
14
=
266
4
×
15
=
60
9
×
5
=
45
10
×
6
=
60
15
×
16
=
240
16
×
7
=
112
18
×
11
=
198
3
×
18
=
54
16
×
6
=
96
3
×
8
=
24
8
×
18
=
144
10
×
20
=
200
17
×
9
=
153
20
×
8
=
160
10
×
6
=
60
12
×
13
=
156
14
×
17
=
238
16
×
19
=
304
13
×
18
=
234
16
×
7
=
112
11
×
20
=
220
1
×
19
=
19
16
×
17
=
272
1
×
5
=
5
5
×
10
=
50
5
×
19
=
95
14
×
13
=
182
4
×
12
=
48
11
×
4
=
44
20
×
12
=
240
10
×
12
=
120
16
×
16
=
256
1
×
15
=
15
14
×
18
=
252
11
×
4
=
44
17
×
5
=
85
1
×
14
=
14
9
×
8
=
72
19
×
4
=
76
16
×
12
=
192
18
×
17
=
306
10
×
6
=
60
1
×
16
=
16
7
×
8
=
56
9
×
19
=
171
14
×
12
=
168
5
×
17
=
85
17
×
15
=
255
16
×
16
=
256
15
×
12
=
180
5
×
8
=
40
17
×
20
=
340
9
×
12
=
108
15
×
4
=
60
1
×
6
=
6
18
×
5
=
90
13
×
2
=
26
11
×
6
=
66
14
×
17
=
238
20
×
17
=
340
5
×
1
=
5
3
×
13
=
39
9
×
14
=
126
16
×
4
=
64
4
×
10
=
40
20
×
7
=
140
20
×
14
=
280
12
×
4
=
48
13
×
20
=
260
1
×
4
=
4
13
×
4
=
52
17
×
10
=
170
7
×
19
=
133
18
×
11
=
198
20
×
3
=
60
6
×
16
=
96
19
×
9
=
171
15
×
9
=
135
5
×
9
=
45
6
×
8
=
48
4
×
16
=
64
16
×
16
=
256
3
×
14
=
42
4
×
9
=
36
7
×
2
=
14
15
×
9
=
135
15
×
12
=
180
5
×
3
=
15
17
×
20
=
340
4
×
11
=
44
11
×
9
=
99
14
×
3
=
42
11
×
5
=
55
1
×
20
=
20
6
×
17
=
102
14
×
7
=
98
7
×
2
=
14
11
×
2
=
22
4
×
13
=
52
17
×
20
=
340
16
×
10
=
160
16
×
13
=
208
1
×
5
=
5
4
×
8
=
32
8
×
7
=
56
20
×
11
=
220
15
×
5
=
75
12
×
15
=
180
18
×
11
=
198
5
×
18
=
90
10
×
1
=
10
6
×
2
=
12
19
×
9
=
171
10
×
15
=
150
6
×
4
=
24
15
×
13
=
195
10
×
12
=
120
10
×
19
=
190
13
×
7
=
91
10
×
11
=
110
5
×
14
=
70
13
×
14
=
182
4
×
16
=
64
14
×
18
=
252
1
×
16
=
16
6
×
10
=
60
4
×
8
=
32
13
×
16
=
208
19
×
16
=
304
15
×
5
=
75
14
×
4
=
56
14
×
2
=
28
3
×
13
=
39
9
×
13
=
117
7
×
4
=
28
17
×
19
=
323
10
×
4
=
40
4
×
8
=
32
8
×
4
=
32
5
×
12
=
60
5
×
6
=
30
16
×
16
=
256
11
×
17
=
187
6
×
2
=
12
15
×
5
=
75
4
×
3
=
12
1
×
4
=
4
10
×
10
=
100
8
×
6
=
48
12
×
13
=
156
19
×
2
=
38
12
×
18
=
216
8
×
1
=
8
5
×
1
=
5
9
×
14
=
126
7
×
18
=
126
10
×
19
=
190
9
×
10
=
90
19
×
13
=
247
4
×
13
=
52
5
×
15
=
75
17
×
10
=
170
14
×
16
=
224
6
×
6
=
36
12
×
19
=
228
9
×
4
=
36
10
×
12
=
120
14
×
12
=
168
19
×
18
=
342
9
×
8
=
72
9
×
9
=
81
10
×
7
=
70
13
×