87 加法 20 等于多少？
87 + 20 = 107
87加法20 等于 107
竖式演算
验算
- 用减法验算：107 − 20 = 87
- 用减法验算：107 − 87 = 20
相关题目
87 + 19 = 106
87 + 21 = 108
87 + 22 = 109
87 + 18 = 105
87 + 23 = 110
87 + 17 = 104
87 + 24 = 111
87 + 16 = 103
86 + 20 = 106
88 + 20 = 108
85 + 20 = 105
89 + 20 = 109
84 + 20 = 104
90 + 20 = 110
83 + 20 = 103
91 + 20 = 111
7 + 100 = 107
8 + 99 = 107
9 + 98 = 107
10 + 97 = 107
11 + 96 = 107
12 + 95 = 107
49 + 44 = 93
72 + 54 = 126
36 + 34 = 70
54 + 39 = 93
72 + 47 = 119
90 + 44 = 134
17 + 96 = 113
61 + 47 = 108