31 减法 1 等于多少？

31 - 1 = 30

31减法1 等于 30

竖式演算

31-130

验算

  • 用加法验算：30 + 1 = 31

相关题目

31 - 2 = 29 31 - 3 = 28 31 - 4 = 27 31 - 5 = 26 31 - 6 = 25 31 - 7 = 24 31 - 8 = 23 31 - 9 = 22 30 - 1 = 29 32 - 1 = 31 29 - 1 = 28 33 - 1 = 32 28 - 1 = 27 34 - 1 = 33 35 - 1 = 34 27 - 1 = 26 32 - 2 = 30 33 - 3 = 30 34 - 4 = 30 35 - 5 = 30 36 - 6 = 30 37 - 7 = 30 98 - 33 = 65 62 - 21 = 41 96 - 4 = 92 98 - 56 = 42 73 - 71 = 2 83 - 21 = 62 10 × 3 = 30 21 + 9 = 30