9 加法 20 等于多少？

9 + 20 = 29

9加法20 等于 29

竖式演算

9+2029

验算

  • 用减法验算：29 − 20 = 9
  • 用减法验算：29 − 9 = 20

相关题目

9 + 19 = 28 9 + 21 = 30 9 + 22 = 31 9 + 18 = 27 9 + 23 = 32 9 + 17 = 26 9 + 24 = 33 9 + 16 = 25 8 + 20 = 28 10 + 20 = 30 11 + 20 = 31 7 + 20 = 27 12 + 20 = 32 6 + 20 = 26 13 + 20 = 33 5 + 20 = 25 1 + 28 = 29 2 + 27 = 29 3 + 26 = 29 4 + 25 = 29 5 + 24 = 29 6 + 23 = 29 5 + 81 = 86 61 + 7 = 68 41 + 30 = 71 41 + 54 = 95 59 + 40 = 99 22 + 44 = 66 45 - 16 = 29 34 - 5 = 29