30 减法 20 等于多少？

30 - 20 = 10

30减法20 等于 10

竖式演算

30-2010

验算

  • 用加法验算：10 + 20 = 30

相关题目

30 - 19 = 11 30 - 21 = 9 30 - 22 = 8 30 - 18 = 12 30 - 23 = 7 30 - 17 = 13 30 - 24 = 6 30 - 16 = 14 29 - 20 = 9 31 - 20 = 11 32 - 20 = 12 28 - 20 = 8 33 - 20 = 13 27 - 20 = 7 34 - 20 = 14 26 - 20 = 6 11 - 1 = 10 12 - 2 = 10 13 - 3 = 10 14 - 4 = 10 15 - 5 = 10 16 - 6 = 10 29 - 27 = 2 83 - 12 = 71 98 - 91 = 7 96 - 61 = 35 75 - 45 = 30 96 - 91 = 5 7 + 3 = 10 2 × 5 = 10