Harry and Terry are each told to calculate 8-(2+5) . Harry gets the correct answer. Terry ignores the parentheses and calculates 8-2+5 . If Harry's answer is H and Terry's answer is T , what is H-T ?
Harry 和 Terry 都被要求计算 $8-(2+5)$。Harry 算对了，而 Terry 忽略了括号，计算的是 8-2+5。若 Harry 的答案是 H，Terry 的答案是 T，那么 H-T 是多少？