31 加法 80 等于多少？
31 + 80 = 111
31加法80 等于 111
竖式演算
验算
- 用减法验算：111 − 80 = 31
- 用减法验算：111 − 31 = 80
相关题目
31 + 79 = 110
31 + 81 = 112
31 + 78 = 109
31 + 82 = 113
31 + 83 = 114
31 + 77 = 108
31 + 84 = 115
31 + 76 = 107
30 + 80 = 110
32 + 80 = 112
29 + 80 = 109
33 + 80 = 113
28 + 80 = 108
34 + 80 = 114
35 + 80 = 115
27 + 80 = 107
11 + 100 = 111
12 + 99 = 111
13 + 98 = 111
14 + 97 = 111
15 + 96 = 111
16 + 95 = 111
70 + 99 = 169
90 + 58 = 148
52 + 75 = 127
45 + 35 = 80
17 + 29 = 46
76 + 15 = 91
37 × 3 = 111
3 × 37 = 111