1¹/₅+3⁴/₅:(2⁵/₁₈- 5⁵¹/₁₂+ 4²/₉)= - ²/₁₁
2⁵/₁₈- 5⁵¹/₁₂+ 4²/₉ = ⁴¹/₁₈ - ¹¹¹/₁₂+ ³⁸/₉=⁴¹ˣ²/₃₆ - ¹¹¹ˣ³/₃₆+ ³⁸ˣ⁴/₃₆= ⁸²/₃₆ - ³³³/₃₆+ ¹⁵²/₃₆ = ⁸²⁻³³³⁺¹⁵²/₃₆ = - ⁹⁹/₃₆ = - ¹¹/₄
3⁴/₅ : (-¹¹/₄) = ¹⁹/₅ × (-⁴/₁₁) = - ¹⁹ˣ⁴/₅ₓ₁₁ = - ⁷⁶/₅₅
1¹/₅ - ⁷⁶/₅₅ = ⁶/₅ - ⁷⁶/₅₅ = ⁶ˣ¹¹/₅₅ - ⁷⁶/₅₅ = ⁶⁶/₅₅ - ⁷⁶/₅₅ = ⁶⁶⁻⁷⁶/₅₅ = -¹⁰/₅₅ = - ²/₁₁
б) 142⁷/₁₀ × 8¹/₂ - 4²⁷/₁₀₀ × 85 дробная черта 34 × 1⁴⁷/₅₀+3²/₅×10³/₅ = 8¹/₃
1) 142⁷/₁₀ × 8¹/₂=¹⁴²⁷/₁₀ × ¹⁷/₂ = ¹⁴²⁷ˣ¹⁷/₁₀ₓ₂ = ²⁴²⁵⁹/₂₀
2) 4²⁷/₁₀₀ × 85 = ⁴²⁷/₁₀₀ × ⁸⁵/₁ = ⁴²⁷ˣ⁸⁵/₁₀₀ = ⁴²⁷ˣ¹⁷/₂₀ = ⁷²⁵⁹/₂₀
3) ²⁴²⁵⁹/₂₀ - ⁷²⁵⁹/₂₀ = ²⁴²⁵⁹⁻⁷²⁵⁹/₂₀ = ¹⁷²⁰⁰/₂₀ = 850
под дробной чертой
1) 34 × 1⁴⁷/₅₀ = ³⁴/₁ × ⁹⁷/₅₀ = ³⁴ˣ⁹⁷/₅₀ = ³²⁹⁸/₅₀ = ¹⁶⁴⁹/₂₅
2) 3²/₅×10³/₅ = ¹⁷/₅×⁵³/₅ = ¹⁷ˣ⁵³/₅ₓ₅ = ⁹⁰¹/₂₅
3) ¹⁶⁴⁹/₂₅ + ⁹⁰/₂₅ = ¹⁶⁴⁹⁺⁹⁰¹/₂₅ = ²⁵⁵⁰/₂₅ = 102
ответ
850 : 102 = 8 ³⁴/₁₀₂ = 8¹/₃