18 加法 3 等于多少？

18 + 3 = 21

18加法3 等于 21

竖式演算

118+321

验算

  • 用减法验算：21 − 3 = 18
  • 用减法验算：21 − 18 = 3

相关题目

18 + 2 = 20 18 + 4 = 22 18 + 1 = 19 18 + 5 = 23 18 + 6 = 24 18 + 7 = 25 18 + 8 = 26 18 + 9 = 27 17 + 3 = 20 19 + 3 = 22 20 + 3 = 23 16 + 3 = 19 21 + 3 = 24 15 + 3 = 18 22 + 3 = 25 14 + 3 = 17 1 + 20 = 21 2 + 19 = 21 3 + 18 = 21 4 + 17 = 21 5 + 16 = 21 6 + 15 = 21 49 + 5 = 54 43 + 28 = 71 92 + 34 = 126 18 + 69 = 87 7 + 67 = 74 71 + 30 = 101 25 - 4 = 21 83 - 62 = 21