7 加法 31 等于多少？

7 + 31 = 38

7加法31 等于 38

竖式演算

7+3138

验算

  • 用减法验算：38 − 31 = 7
  • 用减法验算：38 − 7 = 31

相关题目

7 + 30 = 37 7 + 32 = 39 7 + 29 = 36 7 + 33 = 40 7 + 28 = 35 7 + 34 = 41 7 + 35 = 42 7 + 27 = 34 6 + 31 = 37 8 + 31 = 39 5 + 31 = 36 9 + 31 = 40 4 + 31 = 35 10 + 31 = 41 11 + 31 = 42 3 + 31 = 34 1 + 37 = 38 2 + 36 = 38 3 + 35 = 38 4 + 34 = 38 5 + 33 = 38 6 + 32 = 38 10 + 9 = 19 13 + 55 = 68 36 + 20 = 56 93 + 4 = 97 14 + 45 = 59 30 + 30 = 60 19 × 2 = 38 59 - 21 = 38