31 减法 19 等于多少？
31 - 19 = 12
31减法19 等于 12
竖式演算
验算
- 用加法验算：12 + 19 = 31
相关题目
31 - 20 = 11
31 - 18 = 13
31 - 21 = 10
31 - 17 = 14
31 - 22 = 9
31 - 16 = 15
31 - 23 = 8
31 - 15 = 16
30 - 19 = 11
32 - 19 = 13
29 - 19 = 10
33 - 19 = 14
28 - 19 = 9
34 - 19 = 15
35 - 19 = 16
27 - 19 = 8
13 - 1 = 12
14 - 2 = 12
15 - 3 = 12
16 - 4 = 12
17 - 5 = 12
18 - 6 = 12
42 - 26 = 16
90 - 58 = 32
98 - 79 = 19
44 - 17 = 27
93 - 49 = 44
63 - 25 = 38
2 + 10 = 12
4 × 3 = 12