4 加法 17 等于多少？

4 + 17 = 21

4加法17 等于 21

竖式演算

14+1721

验算

  • 用减法验算：21 − 17 = 4
  • 用减法验算：21 − 4 = 17

相关题目

4 + 16 = 20 4 + 18 = 22 4 + 15 = 19 4 + 19 = 23 4 + 20 = 24 4 + 14 = 18 4 + 21 = 25 4 + 13 = 17 3 + 17 = 20 5 + 17 = 22 2 + 17 = 19 6 + 17 = 23 1 + 17 = 18 7 + 17 = 24 8 + 17 = 25 9 + 17 = 26 1 + 20 = 21 2 + 19 = 21 3 + 18 = 21 5 + 16 = 21 6 + 15 = 21 7 + 14 = 21 38 + 7 = 45 91 + 45 = 136 19 + 56 = 75 40 + 90 = 130 48 + 49 = 97 7 + 58 = 65 89 - 68 = 21 51 - 30 = 21