19 加法 2 等于多少？
19 + 2 = 21
19加法2 等于 21
竖式演算
验算
- 用减法验算：21 − 2 = 19
- 用减法验算：21 − 19 = 2
相关题目
19 + 1 = 20
19 + 3 = 22
19 + 4 = 23
19 + 5 = 24
19 + 6 = 25
19 + 7 = 26
19 + 8 = 27
19 + 9 = 28
20 + 2 = 22
18 + 2 = 20
21 + 2 = 23
17 + 2 = 19
22 + 2 = 24
16 + 2 = 18
23 + 2 = 25
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2 + 19 = 21
3 + 18 = 21
4 + 17 = 21
5 + 16 = 21
6 + 15 = 21
82 + 50 = 132
30 + 73 = 103
29 + 59 = 88
39 + 22 = 61
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44 - 23 = 21