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计算(每题7分,共21分)
(1)|-2|-(-2.5)―|1-4|
(2) (-+-+)×(-24)
(3) -12-[1+(-12)÷6]2×(-)3
计算:(本题共30分)
(1)(-8)-(-1) (2)8+(-10)+(-2)-(-5)
(3)39 ×(-12) (4)24×
(5)