3 加法 18 等于多少？

3 + 18 = 21

3加法18 等于 21

竖式演算

13+1821

验算

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

相关题目

3 + 17 = 20 3 + 19 = 22 3 + 20 = 23 3 + 16 = 19 3 + 21 = 24 3 + 15 = 18 3 + 22 = 25 3 + 14 = 17 2 + 18 = 20 4 + 18 = 22 1 + 18 = 19 5 + 18 = 23 6 + 18 = 24 7 + 18 = 25 8 + 18 = 26 9 + 18 = 27 1 + 20 = 21 2 + 19 = 21 4 + 17 = 21 5 + 16 = 21 6 + 15 = 21 7 + 14 = 21 45 + 45 = 90 60 + 42 = 102 64 + 80 = 144 41 + 19 = 60 56 + 4 = 60 25 + 6 = 31 50 - 29 = 21 27 - 6 = 21