78 减法 57 等于多少?
78 - 57 = 21
78减法57 等于 21
竖式演算
验算
- 用加法验算:21 + 57 = 78
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78 - 56 = 22
78 - 58 = 20
78 - 55 = 23
78 - 59 = 19
78 - 60 = 18
78 - 54 = 24
78 - 61 = 17
78 - 53 = 25
77 - 57 = 20
79 - 57 = 22
76 - 57 = 19
80 - 57 = 23
75 - 57 = 18
81 - 57 = 24
82 - 57 = 25
74 - 57 = 17
22 - 1 = 21
23 - 2 = 21
24 - 3 = 21
25 - 4 = 21
26 - 5 = 21
27 - 6 = 21
75 - 75 = 0
29 - 26 = 3
7 - 1 = 6
75 - 61 = 14
78 - 26 = 52
89 - 28 = 61
1 + 20 = 21
12 + 9 = 21