21 加法 100 等于多少？
21 + 100 = 121
21加法100 等于 121
竖式演算
验算
- 用减法验算：121 − 100 = 21
- 用减法验算：121 − 21 = 100
相关题目
21 + 99 = 120
21 + 98 = 119
21 + 97 = 118
21 + 96 = 117
21 + 95 = 116
21 + 94 = 115
21 + 93 = 114
21 + 92 = 113
20 + 100 = 120
22 + 100 = 122
19 + 100 = 119
23 + 100 = 123
24 + 100 = 124
18 + 100 = 118
25 + 100 = 125
17 + 100 = 117
22 + 99 = 121
23 + 98 = 121
24 + 97 = 121
25 + 96 = 121
26 + 95 = 121
27 + 94 = 121
50 + 42 = 92
15 + 20 = 35
44 + 10 = 54
21 + 40 = 61
66 + 13 = 79
89 + 100 = 189
11 × 11 = 121
61 + 86 = 147