20 加法 89 等于多少？
20 + 89 = 109
20加法89 等于 109
竖式演算
验算
- 用减法验算：109 − 89 = 20
- 用减法验算：109 − 20 = 89
相关题目
20 + 88 = 108
20 + 90 = 110
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20 + 91 = 111
20 + 92 = 112
20 + 86 = 106
20 + 93 = 113
20 + 85 = 105
19 + 89 = 108
21 + 89 = 110
22 + 89 = 111
18 + 89 = 107
23 + 89 = 112
17 + 89 = 106
24 + 89 = 113
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9 + 100 = 109
10 + 99 = 109
11 + 98 = 109
12 + 97 = 109
13 + 96 = 109
14 + 95 = 109
72 + 91 = 163
48 + 46 = 94
27 + 9 = 36
26 + 93 = 119
14 + 56 = 70
16 + 16 = 32
23 + 83 = 106
12 + 34 = 46