9 加法 3 等于多少？

9 + 3 = 12

9加法3 等于 12

竖式演算

19+312

验算

  • 用减法验算：12 − 3 = 9
  • 用减法验算：12 − 9 = 3

相关题目

9 + 2 = 11 9 + 4 = 13 9 + 1 = 10 9 + 5 = 14 9 + 6 = 15 9 + 7 = 16 9 + 8 = 17 9 + 9 = 18 8 + 3 = 11 10 + 3 = 13 11 + 3 = 14 7 + 3 = 10 12 + 3 = 15 6 + 3 = 9 13 + 3 = 16 5 + 3 = 8 1 + 11 = 12 2 + 10 = 12 3 + 9 = 12 4 + 8 = 12 5 + 7 = 12 6 + 6 = 12 50 + 55 = 105 66 + 70 = 136 19 + 2 = 21 30 + 87 = 117 71 + 45 = 116 54 + 72 = 126 71 - 59 = 12 61 - 49 = 12