4 加法 21 等于多少？

4 + 21 = 25

4加法21 等于 25

竖式演算

4+2125

验算

  • 用减法验算：25 − 21 = 4
  • 用减法验算：25 − 4 = 21

相关题目

4 + 20 = 24 4 + 22 = 26 4 + 19 = 23 4 + 23 = 27 4 + 24 = 28 4 + 18 = 22 4 + 25 = 29 4 + 17 = 21 3 + 21 = 24 5 + 21 = 26 2 + 21 = 23 6 + 21 = 27 1 + 21 = 22 7 + 21 = 28 8 + 21 = 29 9 + 21 = 30 1 + 24 = 25 2 + 23 = 25 3 + 22 = 25 5 + 20 = 25 6 + 19 = 25 7 + 18 = 25 71 + 2 = 73 5 + 40 = 45 66 + 1 = 67 55 + 40 = 95 1 + 94 = 95 58 + 30 = 88 5 × 5 = 25 73 - 48 = 25