40 加法 2 等于多少？

40 + 2 = 42

40加法2 等于 42

竖式演算

40+242

验算

  • 用减法验算：42 − 2 = 40
  • 用减法验算：42 − 40 = 2

相关题目

40 + 1 = 41 40 + 3 = 43 40 + 4 = 44 40 + 5 = 45 40 + 6 = 46 40 + 7 = 47 40 + 8 = 48 40 + 9 = 49 39 + 2 = 41 41 + 2 = 43 38 + 2 = 40 42 + 2 = 44 37 + 2 = 39 43 + 2 = 45 44 + 2 = 46 36 + 2 = 38 1 + 41 = 42 2 + 40 = 42 3 + 39 = 42 4 + 38 = 42 5 + 37 = 42 6 + 36 = 42 1 + 66 = 67 4 + 45 = 49 51 + 41 = 92 41 + 57 = 98 71 + 15 = 86 10 + 100 = 110 100 - 58 = 42 90 - 48 = 42