15 加法 3 等于多少？

15 + 3 = 18

15加法3 等于 18

竖式演算

15+318

验算

  • 用减法验算：18 − 3 = 15
  • 用减法验算：18 − 15 = 3

相关题目

15 + 2 = 17 15 + 4 = 19 15 + 1 = 16 15 + 5 = 20 15 + 6 = 21 15 + 7 = 22 15 + 8 = 23 15 + 9 = 24 14 + 3 = 17 16 + 3 = 19 13 + 3 = 16 17 + 3 = 20 12 + 3 = 15 18 + 3 = 21 11 + 3 = 14 19 + 3 = 22 1 + 17 = 18 2 + 16 = 18 3 + 15 = 18 4 + 14 = 18 5 + 13 = 18 6 + 12 = 18 61 + 20 = 81 30 + 24 = 54 25 + 21 = 46 9 + 90 = 99 40 + 14 = 54 14 + 70 = 84 36 - 18 = 18 78 - 60 = 18