19 加法 71 等于多少？
19 + 71 = 90
19加法71 等于 90
竖式演算
验算
- 用减法验算：90 − 71 = 19
- 用减法验算：90 − 19 = 71
相关题目
19 + 70 = 89
19 + 72 = 91
19 + 69 = 88
19 + 73 = 92
19 + 74 = 93
19 + 68 = 87
19 + 75 = 94
19 + 67 = 86
20 + 71 = 91
18 + 71 = 89
21 + 71 = 92
17 + 71 = 88
22 + 71 = 93
16 + 71 = 87
23 + 71 = 94
15 + 71 = 86
1 + 89 = 90
2 + 88 = 90
3 + 87 = 90
4 + 86 = 90
5 + 85 = 90
6 + 84 = 90
39 + 52 = 91
43 + 7 = 50
55 + 25 = 80
3 + 17 = 20
64 + 65 = 129
71 + 46 = 117
3 × 30 = 90
45 × 2 = 90