12 加法 3 等于多少？

12 + 3 = 15

12加法3 等于 15

竖式演算

12+315

验算

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

相关题目

12 + 2 = 14 12 + 4 = 16 12 + 1 = 13 12 + 5 = 17 12 + 6 = 18 12 + 7 = 19 12 + 8 = 20 12 + 9 = 21 11 + 3 = 14 13 + 3 = 16 10 + 3 = 13 14 + 3 = 17 15 + 3 = 18 9 + 3 = 12 16 + 3 = 19 8 + 3 = 11 1 + 14 = 15 2 + 13 = 15 3 + 12 = 15 4 + 11 = 15 5 + 10 = 15 6 + 9 = 15 61 + 32 = 93 12 + 47 = 59 57 + 100 = 157 40 + 47 = 87 10 + 6 = 16 3 + 24 = 27 90 - 75 = 15 99 - 84 = 15