解答

✨ 最佳解答 ✨

b < a < 5
①a = 4
b = 1 or 2 or 3
a + b = 5 or 6 or 7
②a = 3
b = 1 or 2
a + b = 4 or 5
③a = 2
b = 1
a + b = 3

綜上 a + b = 3 or 4 or 5 or 6 or 7

留言
您的問題解決了嗎?