1 加法 19 等于多少？

1 + 19 = 20

1加法19 等于 20

竖式演算

11+1920

验算

  • 用减法验算：20 − 19 = 1
  • 用减法验算：20 − 1 = 19

相关题目

1 + 20 = 21 1 + 18 = 19 1 + 21 = 22 1 + 17 = 18 1 + 22 = 23 1 + 16 = 17 1 + 23 = 24 1 + 15 = 16 2 + 19 = 21 3 + 19 = 22 4 + 19 = 23 5 + 19 = 24 6 + 19 = 25 7 + 19 = 26 8 + 19 = 27 9 + 19 = 28 2 + 18 = 20 3 + 17 = 20 4 + 16 = 20 5 + 15 = 20 6 + 14 = 20 7 + 13 = 20 42 + 86 = 128 14 + 58 = 72 91 + 55 = 146 95 + 90 = 185 26 + 81 = 107 38 + 39 = 77 45 - 25 = 20 27 - 7 = 20