Given that the integral parts of 3 + 5 and 3-5 are a and B respectively, then a + B = 1___ ．

∵ 2 ＜ 5 ＜ 3, ∵ 2 + 3 ＜ 3 + 5 ＜ 3 + 3, - 3 ＜ - 5 ＜ - 2, ∵ 5 ＜ 3 + 5 ＜ 6, 0 ＜ 3-5 ＜ 1, ∵ a = 5, B = 0, ∵ a + B = 5, so the answer is: 5

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