21 减法 4 等于多少？

21 - 4 = 17

21减法4 等于 17

竖式演算

11121-417

验算

  • 用加法验算：17 + 4 = 21

相关题目

21 - 3 = 18 21 - 5 = 16 21 - 2 = 19 21 - 6 = 15 21 - 1 = 20 21 - 7 = 14 21 - 8 = 13 21 - 9 = 12 20 - 4 = 16 22 - 4 = 18 23 - 4 = 19 19 - 4 = 15 24 - 4 = 20 18 - 4 = 14 25 - 4 = 21 17 - 4 = 13 18 - 1 = 17 19 - 2 = 17 20 - 3 = 17 22 - 5 = 17 23 - 6 = 17 24 - 7 = 17 92 - 58 = 34 92 - 75 = 17 82 - 57 = 25 63 - 47 = 16 84 - 46 = 38 91 - 38 = 53 12 + 5 = 17 4 + 13 = 17