87 减法 21 等于多少？
87 - 21 = 66
87减法21 等于 66
竖式演算
验算
- 用加法验算：66 + 21 = 87
相关题目
87 - 20 = 67
87 - 22 = 65
87 - 19 = 68
87 - 23 = 64
87 - 24 = 63
87 - 18 = 69
87 - 25 = 62
87 - 17 = 70
86 - 21 = 65
88 - 21 = 67
85 - 21 = 64
89 - 21 = 68
84 - 21 = 63
90 - 21 = 69
91 - 21 = 70
83 - 21 = 62
67 - 1 = 66
68 - 2 = 66
69 - 3 = 66
70 - 4 = 66
71 - 5 = 66
72 - 6 = 66
94 - 94 = 0
27 - 2 = 25
74 - 21 = 53
87 - 82 = 5
67 - 11 = 56
78 - 5 = 73
63 + 3 = 66
21 + 45 = 66