50 加法 31 等于多少？
50 + 31 = 81
50加法31 等于 81
竖式演算
验算
- 用减法验算：81 − 31 = 50
- 用减法验算：81 − 50 = 31
相关题目
50 + 30 = 80
50 + 32 = 82
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50 + 33 = 83
50 + 28 = 78
50 + 34 = 84
50 + 35 = 85
50 + 27 = 77
49 + 31 = 80
51 + 31 = 82
48 + 31 = 79
52 + 31 = 83
47 + 31 = 78
53 + 31 = 84
46 + 31 = 77
54 + 31 = 85
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
4 + 77 = 81
5 + 76 = 81
6 + 75 = 81
50 + 5 = 55
10 + 5 = 15
11 + 78 = 89
40 + 20 = 60
44 + 43 = 87
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84 - 3 = 81
98 - 17 = 81