9 加法 31 等于多少？

9 + 31 = 40

9加法31 等于 40

竖式演算

19+3140

验算

  • 用减法验算：40 − 31 = 9
  • 用减法验算：40 − 9 = 31

相关题目

9 + 30 = 39 9 + 32 = 41 9 + 29 = 38 9 + 33 = 42 9 + 28 = 37 9 + 34 = 43 9 + 35 = 44 9 + 27 = 36 8 + 31 = 39 10 + 31 = 41 11 + 31 = 42 7 + 31 = 38 12 + 31 = 43 6 + 31 = 37 13 + 31 = 44 5 + 31 = 36 1 + 39 = 40 2 + 38 = 40 3 + 37 = 40 4 + 36 = 40 5 + 35 = 40 6 + 34 = 40 84 + 92 = 176 37 + 39 = 76 46 + 7 = 53 3 + 68 = 71 6 + 79 = 85 18 + 72 = 90 73 - 33 = 40 88 - 48 = 40