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B) 4,4:(-0,01):(-110):(-¹₂) = 440:(-1):(-110):(-¹₂) = (-440):(-110):(-¹₂) = 4:(-¹₂) =⁴₁ × (-¹₂) = - ⁴₂ = -2
C) 2²₃:(-⁶₇):(-⁴₉) = ⁸₃ × (-⁷₆):(-⁴₉) = (-⁵⁶₁₈) × (-⁹₄) = 7
D) -³₇x2,7:(-³₅₄):(-3¹₇) = -³₇ × ²⁷₁₀ :(-³₅₄):(-3¹₇) =
=(-⁸¹₇₀) × (-⁵⁴₃) :(-3¹₇) = ⁷²⁹₃₅ × (-⁷₂₂) = - ⁷²⁹₁₁₀ = -6⁶⁹₁₁₀