21 减法 9 等于多少？

21 - 9 = 12

21减法9 等于 12

竖式演算

11121-912

验算

  • 用加法验算：12 + 9 = 21

相关题目

21 - 8 = 13 21 - 10 = 11 21 - 7 = 14 21 - 11 = 10 21 - 6 = 15 21 - 12 = 9 21 - 5 = 16 21 - 13 = 8 20 - 9 = 11 22 - 9 = 13 19 - 9 = 10 23 - 9 = 14 18 - 9 = 9 24 - 9 = 15 25 - 9 = 16 17 - 9 = 8 13 - 1 = 12 14 - 2 = 12 15 - 3 = 12 16 - 4 = 12 17 - 5 = 12 18 - 6 = 12 52 - 16 = 36 41 - 34 = 7 70 - 68 = 2 63 - 54 = 9 72 - 44 = 28 10 + 2 = 12 5 + 7 = 12 3 + 9 = 12