39 加法 1 等于多少？

39 + 1 = 40

39加法1 等于 40

竖式演算

139+140

验算

  • 用减法验算：40 − 1 = 39
  • 用减法验算：40 − 39 = 1

相关题目

39 + 2 = 41 39 + 3 = 42 39 + 4 = 43 39 + 5 = 44 39 + 6 = 45 39 + 7 = 46 39 + 8 = 47 39 + 9 = 48 38 + 1 = 39 40 + 1 = 41 37 + 1 = 38 41 + 1 = 42 42 + 1 = 43 36 + 1 = 37 43 + 1 = 44 35 + 1 = 36 1 + 39 = 40 2 + 38 = 40 3 + 37 = 40 4 + 36 = 40 5 + 35 = 40 6 + 34 = 40 53 + 50 = 103 9 + 41 = 50 54 + 80 = 134 81 + 65 = 146 30 + 98 = 128 70 + 46 = 116 70 - 30 = 40 95 - 55 = 40