-5,13:(3 1/4+2/3•))-2 18/25

- 5,13 : (3¹/₄ + ²/₃ × ( - 1,5)) - 2¹⁸/₂₅ = - 5

1) ²/₃ × ( - 1,5) = ²/₃ × ( - ¹⁵/₁₀)= ²/₃ × ( - ³/₂)= - ²ˣ³/₃ˣ₂ = -1

2) 3¹/₄ +(-1) = 3¹/₄ -1 = 2¹/₄ = 2,25

3) (-5,13) : 2,25 = - 2,28 = - 2²⁸/₁₀₀ = -2⁷/₂₅

4) -2⁷/₂₅ - 2 ¹⁸/₂₅ = - 4²⁵/₂₅ = - 5