30 加法 1 等于多少？

30 + 1 = 31

30加法1 等于 31

竖式演算

30+131

验算

  • 用减法验算：31 − 1 = 30
  • 用减法验算：31 − 30 = 1

相关题目

30 + 2 = 32 30 + 3 = 33 30 + 4 = 34 30 + 5 = 35 30 + 6 = 36 30 + 7 = 37 30 + 8 = 38 30 + 9 = 39 29 + 1 = 30 31 + 1 = 32 28 + 1 = 29 32 + 1 = 33 33 + 1 = 34 27 + 1 = 28 34 + 1 = 35 26 + 1 = 27 1 + 30 = 31 2 + 29 = 31 3 + 28 = 31 4 + 27 = 31 5 + 26 = 31 6 + 25 = 31 55 + 31 = 86 42 + 45 = 87 10 + 89 = 99 5 + 73 = 78 77 + 100 = 177 62 + 4 = 66 37 - 6 = 31 98 - 67 = 31