整数乘法简便计算全面系统强烈推荐105Word下载.docx
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69×
89+69
64×
81×
11-81
21×
101
74×
28×
54×
7×
77+7×
23
93×
(70+1)
89×
72×
39+64
16×
71-16
22×
27×
45×
85×
46+85×
54
26×
(40+4)
49×
17×
91×
99+91
41-54
80×
12×
43×
84×
48+84×
52
36×
(80+4)
62×
49+62
83×
81-83
30×
50×
88+32×
12
73×
(60+4)
20×
40×
89+91
91-49
46×
82×
12+82×
88
87×
70×
89+27
48×
76×
71-76
47×
79×
17+79×
83
(40+6)
23×
42×
39+80
31-84
78×
55×
29×
82+16×
18
(20+1)
99+42
91-72
57×
9×
39×
81+39×
19
(20+4)
69+23
41-93
92×
51×
23+81×
77
(50+5)
49+32
90×
41-90
13×
59×
99×
6×
53+6×
47
(40+8)
96×
29+49
81-90
37×
58×
17+91×
(70+5)
18×
59+29
86×
91-86
14×
51+59×
49
34×
(80+5)
35×
89+35
31-37
49+58×
51
(80+9)
66×
99+66
91-92
31×
45+69×
55
(90+4)
69+73
11×
61-11
61×
63×
88×
69+42×
31
(60+1)
75×
39+75
21-76
33×
85+94×
15
(10+9)
19+66
98×
61-98
34+63×
66
(60+9)
89+80
38×
10×
49+10×
(90+5)
99+40
31-40
77+48×
(30+9)
67×
39+67
71-28
18+62×
82
44×
39+22
81-54
62+13×
38
(50+1)
39+99
61-82
52×
97×
91+83×
9
19+94
81-75
68×
13+40×
87
(20+9)
19+84
71-89
64+35×
36
39+26
71-52