乘法简便计算9.docx
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乘法简便计算9.docx
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乘法简便计算9
4
×
44
×
25
36
×
25
125
×
46
×
8
93
×
93
+
93
×
7
25
×
80
×
4
27
×
(70
+
5)
8
×
83
×
125
42
×
99
30
×
19
+
30
8
×
125
66
×
21
-
66
33
×
101
4
×
42
×
25
40
×
25
125
×
98
×
8
28
×
78
+
28
×
22
25
×
2
×
4
27
×
(10
+
8)
8
×
38
×
125
51
×
99
53
×
99
+
53
72
×
125
22
×
61
-
22
14
×
99
4
×
60
×
25
20
×
25
125
×
37
×
8
62
×
19
+
62
×
81
25
×
42
×
4
24
×
(50
+
8)
8
×
35
×
125
57
×
101
94
×
29
+
94
32
×
125
94
×
81
-
94
47
×
101
4
×
53
×
25
20
×
25
125
×
43
×
8
19
×
48
+
19
×
52
25
×
94
×
4
27
×
(20
+
6)
8
×
60
×
125
64
×
99
29
×
89
+
29
72
×
125
15
×
21
-
15
96
×
99
4
×
12
×
25
12
×
25
125
×
63
×
8
37
×
22
+
37
×
78
25
×
82
×
4
26
×
(50
+
5)
8
×
84
×
125
13
×
99
26
×
69
+
26
24
×
125
78
×
91
-
78
23
×
101
4
×
7
×
25
12
×
25
125
×
77
×
8
35
×
70
+
35
×
30
25
×
37
×
4
27
×
(80
+
4)
8
×
20
×
125
48
×
99
89
×
39
+
89
24
×
125
85
×
51
-
85
45
×
101
4
×
9
×
25
28
×
25
125
×
93
×
8
25
×
18
+
25
×
82
25
×
53
×
4
23
×
(60
+
2)
8
×
38
×
125
73
×
101
89
×
49
+
89
56
×
125
99
×
21
-
99
78
×
99
4
×
97
×
25
20
×
25
125
×
10
×
8
51
×
85
+
51
×
15
25
×
42
×
4
22
×
(80
+
9)
8
×
11
×
125
78
×
99
49
×
79
+
49
32
×
125
28
×
41
-
28
49
×
101
4
×
29
×
25
36
×
25
125
×
3
×
8
54
×
57
+
54
×
43
25
×
78
×
4
26
×
(80
+
6)
8
×
22
×
125
84
×
99
77
×
59
+
77
56
×
125
80
×
21
-
80
73
×
99
4
×
66
×
25
36
×
25
125
×
80
×
8
13
×
84
+
13
×
16
25
×
19
×
4
22
×
(60
+
3)
8
×
31
×
125
41
×
101
66
×
69
+
66
48
×
125
78
×
91
-
78
61
×
99
4
×
43
×
25
32
×
25
125
×
20
×
8
25
×
91
+
25
×
9
25
×
67
×
4
26
×
(70
+
9)
8
×
69
×
125
27
×
99
66
×
29
+
66
24
×
125
38
×
81
-
38
96
×
99
4
×
35
×
25
16
×
25
125
×
45
×
8
85
×
91
+
85
×
9
25
×
81
×
4
25
×
(80
+
9)
8
×
15
×
125
85
×
99
83
×
39
+
83
24
×
125
91
×
11
-
91
84
×
99
4
×
55
×
25
36
×
25
125
×
24
×
8
37
×
74
+
37
×
26
25
×
68
×
4
27
×
(20
+
3)
8
×
49
×
125
51
×
99
88
×
59
+
88
32
×
125
27
×
21
-
27
84
×
101
4
×
64
×
25
28
×
25
125
×
2
×
8
20
×
70
+
20
×
30
25
×
30
×
4
29
×
(30
+
9)
8
×
15
×
125
79
×
99
23
×
69
+
23
64
×
125
17
×
81
-
17
11
×
101
4
×
94
×
25
16
×
25
125
×
63
×
8
90
×
14
+
90
×
86
25
×
93
×
4
24
×
(90
+
9)
8
×
67
×
125
78
×
99
72
×
99
+
72
24
×
125
95
×
61
-
95
29
×
99
4
×
3
×
25
24
×
25
125
×
52
×
8
37
×
13
+
37
×
87
25
×
27
×
4
27
×
(50
+
6)
8
×
24
×
125
40
×
101
48
×
79
+
48
8
×
125
96
×
21
-
96
14
×
101
4
×
46
×
25
32
×
25
125
×
47
×
8
89
×
35
+
89
×
65
25
×
54
×
4
28
×
(50
+
3)
8
×
42
×
125
26
×
99
49
×
19
+
49
72
×
125
57
×
11
-
57
36
×
99
4
×
54
×
25
12
×
25
125
×
8
×
8
91
×
54
+
91
×
46
25
×
12
×
4
24
×
(40
+
6)
8
×
33
×
125
23
×
99
21
×
29
+
21
24
×
125
66
×
31
-
66
42
×
101
4
×
92
×
25
4
×
25
125
×
86
×
8
67
×
69
+
67
×
31
25
×
52
×
4
21
×
(30
+
9)
8
×
44
×
125
39
×
99
44
×
99
+
44
24
×
125
38
×
11
-
38
20
×
99
4
×
51
×
25
4
×
25
125
×
80
×
8
49
×
89
+
49
×
11
25
×
71
×
4
29
×
(80
+
3)
8
×
42
×
125
82
×
101
63
×
99
+
63
32
×
125
48
×
81
-
48
69
×
99
4
×
61
×
25
32
×
25
125
×
60
×
8
3
×
44
+
3
×
56
25
×
13
×
4
23
×
(30
+
3)
8
×
13
×
125
61
×
99
77
×
29
+
77
48
×
125
38
×
51
-
38
19
×
101
4
×
62
×
25
24
×
25
125
×
62
×
8
97
×
62
+
97
×
38
25
×
88
×
4
21
×
(50
+
4)
8
×
6
×
125
56
×
101
86
×
89
+
86
8
×
125
16
×
61
-
16
91
×
99
4
×
40
×
25
16
×
25
125
×
15
×
8
8
×
47
+
8
×
53
25
×
27
×
4
25
×
(50
+
3)
8
×
50
×
125
42
×
99
14
×
39
+
14
56
×
125
80
×
41
-
80
11
×
99
4
×
15
×
25
24
×
25
125
×
52
×
8
66
×
64
+
66
×
36
25
×
89
×
4
27
×
(40
+
3)
8
×
26
×
125
71
×
99
21
×
49
+
21
56
×
125
96
×
21
-
96
42
×
101
4
×
33
×
25
4
×
25
125
×
81
×
8
23
×
12
+
23
×
88
25
×
94
×
4
22
×
(10
+
3)
8
×
86
×
125
33
×
101
80
×
49
+
80
64
×
125
18
×
11
-
18
99
×
101
4
×
35
×
25
32
×
25
125
×
66
×
8
16
×
12
+
16
×
88
25
×
39
×
4
24
×
(10
+
9)
8
×
46
×
125
88
×
99
12
×
69
+
12
24
×
125
86
×
21
-
86
57
×
99
4
×
85
×
25
24
×
25
125
×
55
×
8
65
×
29
+
65
×
71
25
×
65
×
4
24
×
(70
+
3)
8
×
23
×
125
68
×
101
58
×
19
+
58
24
×
125
41
×
71
-
41
14
×
101
4
×
4
×
25
8
×
25
125
×
23
×
8
83
×
45
+
83
×
55
25
×
55
×
4
21
×
(60
+
5)
8
×
59
×
125
43
×
101
14
×
49
+
14
48
×
125
47
×
51
-
47
27
×
99
4
×
88
×
25
24
×
25
125
×
68
×
8
2
×
96
+
2
×
4
25
×
61
×
4
29
×
(50
+
5)
8
×
8
×
125
17
×
99
81
×
39
+
81
32
×
125
11
×
71
-
11
85
×
99
4
×
77
×
25
4
×
25
125
×
26
×
8
86
×
43
+
86
×
57
25
×
28
×
4
23
×
(90
+
9)
8
×
45
×
125
47
×
99
50
×
19
+
50
64
×
125
52
×
61
-
52
99
×
101
4
×
22
×
25
40
×
25
125
×
25
×
8
99
×
17
+
99
×
83
25
×
21
×
4
21
×
(40
+
2)
8
×
93
×
125
20
×
99
64
×
89
+
64
64
×
125
37
×
91
-
37
25
×
99
4
×
56
×
25
28
×
25
125
×
68
×
8
44
×
81
+
44
×
19
25
×
57
×
4
22
×
(20
+
9)
8
×
60
×
125
29
×
101
95
×
79
+
95
80
×
125
30
×
71
-
30
19
×
99
4
×
56
×
25
28
×
25
125
×
29
×
8
26
×
53
+
26
×
47
25
×
36
×
4
21
×
(30
+
1)
8
×
46
×
125
57
×
99
78
×
69
+
78
24
×
125
93
×
31
-
93
16
×
99
4
×
42
×
25
32
×
25
125
×
27
×
8
79
×
22
+
79
×
78
25
×
41
×
4
29
×
(50
+
5)
8
×
39
×
125
91
×
99
16
×
39
+
16
72
×
125
29
×
71
-
29
67
×
99
4
×
76
×
25
24
×
25
125
×
37
×
8
74
×
47
+
74
×
53
25
×
61
×
4
23
×
(40
+
5)
8
×
85
×
125
65
×
99
24
×
99
+
24
64
×
125
88
×
61
-
88
11
×
99
4
×
22
×
25
32
×
25
125
×
72
×
8
57
×
93
+
57
×
7
25
×
31
×
4
23
×
(50
+
6)
8
×
93
×
125
32
×
101
80
×
99
+
80
32
×
125
73
×
61
-
73
13
×
99
4
×
60
×
25
40
×
25
125
×
3
×
8
68
×
91
+
68
×
9
25
×
93
×
4
29
×
(80
+
5)
8
×
37
×
125
29
×
101
93
×
49
+
93
40
×
125
87
×
81
-
87
17
×
99
4
×
67
×
25
4
×
25
125
×
41
×
8
60
×
69
+
60
×
31
25
×
14
×
4
28
×
(90
+
7)
8
×
41
×
125
14
×
101
58
×
49
+
58
32
×
125
34
×
11
-
34
79
×
101
4
×
89
×
25
40
×
25
125
×
33
×
8
75
×
20
+
75
×
80
25
×
2
×
4
28
×
(60
+
6)
8
×
91
×
125
15
×
101
66
×
69
+
66
8
×
125
60
×
91
-
60
42
×
99
4
×
45
×
25
12
×
25
125
×
13
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