2 加法 7 等于多少？

2 + 7 = 9

2加法7 等于 9

竖式演算

2+79

验算

  • 用减法验算：9 − 7 = 2
  • 用减法验算：9 − 2 = 7

相关题目

2 + 6 = 8 2 + 8 = 10 2 + 5 = 7 2 + 9 = 11 2 + 4 = 6 2 + 10 = 12 2 + 11 = 13 2 + 3 = 5 1 + 7 = 8 3 + 7 = 10 4 + 7 = 11 5 + 7 = 12 6 + 7 = 13 7 + 7 = 14 8 + 7 = 15 9 + 7 = 16 1 + 8 = 9 3 + 6 = 9 4 + 5 = 9 5 + 4 = 9 6 + 3 = 9 7 + 2 = 9 5 + 31 = 36 100 + 11 = 111 81 + 15 = 96 5 + 70 = 75 22 + 1 = 23 92 + 6 = 98 74 - 65 = 9 65 - 56 = 9