20 减法 1 等于多少？

20 - 1 = 19

20减法1 等于 19

竖式演算

11020-119

验算

  • 用加法验算：19 + 1 = 20

相关题目

20 - 2 = 18 20 - 3 = 17 20 - 4 = 16 20 - 5 = 15 20 - 6 = 14 20 - 7 = 13 20 - 8 = 12 20 - 9 = 11 19 - 1 = 18 21 - 1 = 20 22 - 1 = 21 18 - 1 = 17 23 - 1 = 22 17 - 1 = 16 24 - 1 = 23 16 - 1 = 15 21 - 2 = 19 22 - 3 = 19 23 - 4 = 19 24 - 5 = 19 25 - 6 = 19 26 - 7 = 19 58 - 9 = 49 40 - 13 = 27 42 - 16 = 26 70 - 14 = 56 76 - 59 = 17 94 - 69 = 25 17 + 2 = 19 4 + 15 = 19