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 89 + 80 = 169 32 + 92 = 124 15 + 59 = 74 71 + 41 = 112 92 + 23 = 115 43 + 49 = 92 66 - 46 = 20 64 - 44 = 20