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 60 + 26 = 86 35 + 62 = 97 12 + 62 = 74 14 + 44 = 58 52 + 25 = 77 20 + 62 = 82 95 - 56 = 39 63 - 24 = 39