3 加法 12 等于多少？

3 + 12 = 15

3加法12 等于 15

竖式演算

3+1215

验算

  • 用减法验算：15 − 12 = 3
  • 用减法验算：15 − 3 = 12

相关题目

3 + 11 = 14 3 + 13 = 16 3 + 10 = 13 3 + 14 = 17 3 + 15 = 18 3 + 9 = 12 3 + 16 = 19 3 + 8 = 11 2 + 12 = 14 4 + 12 = 16 1 + 12 = 13 5 + 12 = 17 6 + 12 = 18 7 + 12 = 19 8 + 12 = 20 9 + 12 = 21 1 + 14 = 15 2 + 13 = 15 4 + 11 = 15 5 + 10 = 15 6 + 9 = 15 7 + 8 = 15 23 + 20 = 43 3 + 63 = 66 8 + 91 = 99 44 + 31 = 75 5 + 1 = 6 2 + 83 = 85 84 - 69 = 15 79 - 64 = 15