31 加法 8 等于多少？

31 + 8 = 39

31加法8 等于 39

竖式演算

31+839

验算

  • 用减法验算：39 − 8 = 31
  • 用减法验算：39 − 31 = 8

相关题目

31 + 7 = 38 31 + 9 = 40 31 + 6 = 37 31 + 10 = 41 31 + 11 = 42 31 + 5 = 36 31 + 12 = 43 31 + 4 = 35 30 + 8 = 38 32 + 8 = 40 29 + 8 = 37 33 + 8 = 41 28 + 8 = 36 34 + 8 = 42 35 + 8 = 43 27 + 8 = 35 1 + 38 = 39 2 + 37 = 39 3 + 36 = 39 4 + 35 = 39 5 + 34 = 39 6 + 33 = 39 33 + 1 = 34 1 + 22 = 23 74 + 13 = 87 47 + 51 = 98 91 + 3 = 94 10 + 83 = 93 40 - 1 = 39 67 - 28 = 39