8 加法 1 等于多少？

8 + 1 = 9

8加法1 等于 9

竖式演算

8+19

验算

  • 用减法验算：9 − 1 = 8
  • 用减法验算：9 − 8 = 1

相关题目

8 + 2 = 10 8 + 3 = 11 8 + 4 = 12 8 + 5 = 13 8 + 6 = 14 8 + 7 = 15 8 + 8 = 16 8 + 9 = 17 7 + 1 = 8 9 + 1 = 10 6 + 1 = 7 10 + 1 = 11 11 + 1 = 12 5 + 1 = 6 12 + 1 = 13 4 + 1 = 5 1 + 8 = 9 2 + 7 = 9 3 + 6 = 9 4 + 5 = 9 5 + 4 = 9 6 + 3 = 9 35 + 53 = 88 20 + 20 = 40 71 + 21 = 92 11 + 48 = 59 93 + 100 = 193 47 + 40 = 87 95 - 86 = 9 17 - 8 = 9