90 加法 20 等于多少？
90 + 20 = 110
90加法20 等于 110
竖式演算
验算
- 用减法验算：110 − 20 = 90
- 用减法验算：110 − 90 = 20
相关题目
90 + 19 = 109
90 + 21 = 111
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90 + 18 = 108
90 + 23 = 113
90 + 17 = 107
90 + 24 = 114
90 + 16 = 106
89 + 20 = 109
91 + 20 = 111
92 + 20 = 112
88 + 20 = 108
93 + 20 = 113
87 + 20 = 107
94 + 20 = 114
86 + 20 = 106
10 + 100 = 110
11 + 99 = 110
12 + 98 = 110
13 + 97 = 110
14 + 96 = 110
15 + 95 = 110
28 + 47 = 75
27 + 92 = 119
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63 + 86 = 149
17 + 57 = 74
92 + 31 = 123
11 × 10 = 110
2 × 55 = 110