9 加法 8 等于多少？

9 + 8 = 17

9加法8 等于 17

竖式演算

19+817

验算

  • 用减法验算：17 − 8 = 9
  • 用减法验算：17 − 9 = 8

相关题目

9 + 7 = 16 9 + 9 = 18 9 + 6 = 15 9 + 10 = 19 9 + 11 = 20 9 + 5 = 14 9 + 12 = 21 9 + 4 = 13 8 + 8 = 16 10 + 8 = 18 11 + 8 = 19 7 + 8 = 15 12 + 8 = 20 6 + 8 = 14 13 + 8 = 21 5 + 8 = 13 1 + 16 = 17 2 + 15 = 17 3 + 14 = 17 4 + 13 = 17 5 + 12 = 17 6 + 11 = 17 31 + 90 = 121 52 + 19 = 71 51 + 73 = 124 63 + 8 = 71 71 + 82 = 153 33 + 57 = 90 100 - 83 = 17 88 - 71 = 17