人教版四年级数学下册乘除法简便计算 451Word文档下载推荐.docx
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44-44×
4
17×
43+64×
57
32×
25091×
999+91
47-47
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30129×
43-43×
24×
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46+54×
954
35×
12574×
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88-88
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33-33×
2
96×
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54-54×
41×
8×
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91
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78-78
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969
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49-49×
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92-92×
47×
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77
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99+53
72×
35-35
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6
26×
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94+31×
33×
5091×
3100÷
41-41
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51-51×
217×
27-27×
7
45×
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10+84×
990
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999+93
80×
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81-81
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13-13×
12×
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68+37×
932
78×
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89-89
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67-67×
42×
238×
98-98×
8
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929
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72-72
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922
75×
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27-27
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816×
39-39×
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96-96×
62×
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73-73
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48-48×
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38
81×
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85-85
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78-78×
57×
235×
15-15×
5
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56+26×
28×
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65-65
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26-26×
29991×
83+91×
17
64×
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837×
28-28×
38×
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79-79×
63×
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979
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25-25
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28
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46-46
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96
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46
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26-26
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50
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939
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11-11
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63-63×
61×
20035×
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29