3 加法 17 等于多少？

3 + 17 = 20

3加法17 等于 20

竖式演算

13+1720

验算

  • 用减法验算：20 − 17 = 3
  • 用减法验算：20 − 3 = 17

相关题目

3 + 16 = 19 3 + 18 = 21 3 + 15 = 18 3 + 19 = 22 3 + 20 = 23 3 + 14 = 17 3 + 21 = 24 3 + 13 = 16 2 + 17 = 19 4 + 17 = 21 1 + 17 = 18 5 + 17 = 22 6 + 17 = 23 7 + 17 = 24 8 + 17 = 25 9 + 17 = 26 1 + 19 = 20 2 + 18 = 20 4 + 16 = 20 5 + 15 = 20 6 + 14 = 20 7 + 13 = 20 74 + 84 = 158 77 + 81 = 158 64 + 83 = 147 71 + 75 = 146 78 + 70 = 148 37 + 48 = 85 74 - 54 = 20 36 - 16 = 20