19 加法 1 等于多少？

19 + 1 = 20

19加法1 等于 20

竖式演算

119+120

验算

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

相关题目

19 + 2 = 21 19 + 3 = 22 19 + 4 = 23 19 + 5 = 24 19 + 6 = 25 19 + 7 = 26 19 + 8 = 27 19 + 9 = 28 20 + 1 = 21 18 + 1 = 19 21 + 1 = 22 17 + 1 = 18 22 + 1 = 23 16 + 1 = 17 23 + 1 = 24 15 + 1 = 16 1 + 19 = 20 2 + 18 = 20 3 + 17 = 20 4 + 16 = 20 5 + 15 = 20 6 + 14 = 20 33 + 57 = 90 46 + 38 = 84 33 + 74 = 107 69 + 24 = 93 41 + 84 = 125 72 + 46 = 118 37 - 17 = 20 80 - 60 = 20