1)(3¹/₃+5¹/₆)ײ/₅ - 2³/₄:(1¹/₂-²/₅) = 0,9
3¹/₃+5¹/₆ = ¹⁰/₃+³¹/₆ = ¹⁰ˣ²/₆+³¹/₆ = ²⁰/₆+³¹/₆ = ²⁰⁺³¹/₆ = ⁵¹/₆
⁵¹/₆ײ/₅ = ⁵¹ˣ²/₆ₓ₅ = ¹⁰²/₃₀ = ¹⁷/₅
1¹/₂-²/₅ = ³/₂-²/₅ = ³ˣ⁵/₁₀ - ²ˣ²/₁₀ = ¹⁵/₁₀ - ⁴/₁₀ = ¹⁵⁻⁴/₁₀ = ¹¹/₁₀
2³/₄ : ¹¹/₁₀ = ¹¹/₄ : ¹¹/₁₀ = ¹¹/₄ × ¹⁰/₁₁ = ¹¹ˣ¹⁰/₄ₓ₁₁ = ¹⁰/₄ = ⁵/₂
¹⁷/₅ - ⁵/₂ = ¹⁷ˣ²/₁₀ - ⁵ˣ⁵/₁₀ = ³⁴/₁₀ - ²⁵/₁₀ = ³⁴⁻²⁵/₁₀ = ⁹/₁₀ = 0,9
2) 3¹/₃ × 2²/₅ × 24⁸/₁₅ × ³/₁₇) = 368
3¹/₃ × 2²/₅ = ¹⁰/₃ × ¹²/₅ = ¹⁰ˣ¹²/₃ₓ₅=²ˣ⁴/₁ₓ₁ = ⁸/₁
⁸/₁ × 24⁸/₁₅ = ⁸/₁ × ³⁶⁸/₁₅ = ⁸ˣ³⁶⁸/₁ₓ₁₅ = ⁵⁵²⁰/₁₅ = 368
3) (¹/₈ + ²/₉ -¹/₄) × 5¹/₇ :(⁷/₉ -²/₃ +¹/₆) =⁵/₁₈
¹/₈ - ¹/₄ = ¹/₈ - ²/₈ = - ¹/₈
²/₉ - ¹/₈ = ²ˣ⁸/₇₂ - ¹ˣ⁹/₇₂ = ¹⁶/₇₂ - ⁹/₇₂ = ¹⁶⁻⁹/₇₂ = ⁷/₇₂
⁷/₇₂ × 5¹/₇ = ⁷/₇₂ × ³⁶/₇ = ⁷ˣ³⁶/₇₂ₓ₇ = ¹/₂
⁷/₉ -²/₃ = ⁷/₉ -²ˣ³/₉ = ⁷/₉ -⁶/₉ = ⁷⁻⁶/₉ = ¹/₉
¹/₉ + ¹/₆ = ¹ˣ²/₁₈ + ³ˣ¹/₁₈ = ²⁺³/₁₈ = ⁵/₁₈
4) (10³/₄ - 12: 1¹/₅) × ⁴/₉ +2¹/₆ + 2¹/₆ + 3¹/₄ :5¹/₅ = 5⁷/₂₄
12: 1¹/₅ =¹²/₁: ⁶/₅ =¹²/₁ × ⁵/₆ = ¹²ˣ⁵/₁ₓ₆=²ˣ⁵/₁ = ¹⁰/₁ = 10
10³/₄ - 10 = ³/₄
³/₄× ⁴/₉ = ³ˣ⁴/₄ₓ₉ = ³/₉ = ¹/₃
3¹/₄ :5¹/₅ = ¹³/₄ : ²⁶/₅ = ¹³/₄ ×⁵/₂₆ = ¹³ˣ⁵/₄ₓ₂₆ = ¹ˣ⁵/₄ₓ₂ = ⁵/₈
¹/₃ + 2¹/₆ = ¹/₃ + ¹³/₆ = ²/₆ + ¹³/₆ = ²⁺¹³/₆ = ¹⁵/₆
¹⁵/₆ + 2¹/₆ = ¹⁵/₆ + ¹³/₆ = ¹⁵⁺¹³/₆ = ²⁸/₆
²⁸/₆ + ⁵/₈ = ²⁸ˣ⁴/₂₄ + ⁵ˣ³/₂₄ = ²⁸ˣ⁴/₂₄ + ⁵ˣ³/₂₄ = ¹¹²/₂₄ + ¹⁵/₂₄ = ¹¹²⁺¹⁵/₂₄ = ¹²⁷/₂₄=5⁷/₂₄
Я думаю, в последнем примере у Вас опечатка, наверное 2¹/₆ нужно прибавлять только 1 раз, тогда пример будет выглядеть вот так:
4) (10³/₄ - 12: 1¹/₅) × ⁴/₉ +2¹/₆ + 3¹/₄ :5¹/₅ = 3¹/₈
12: 1¹/₅ =¹²/₁: ⁶/₅ =¹²/₁ × ⁵/₆ = ¹²ˣ⁵/₁ₓ₆=²ˣ⁵/₁ = ¹⁰/₁ = 10
10³/₄ - 10 = ³/₄
³/₄× ⁴/₉ = ³ˣ⁴/₄ₓ₉ = ³/₉ = ¹/₃
3¹/₄ :5¹/₅ = ¹³/₄ : ²⁶/₅ = ¹³/₄ ×⁵/₂₆ = ¹³ˣ⁵/₄ₓ₂₆ = ¹ˣ⁵/₄ₓ₂ = ⁵/₈
¹/₃ + 2¹/₆ = ¹/₃ + ¹³/₆ = ²/₆ + ¹³/₆ = ²⁺¹³/₆ = ¹⁵/₆ = ⁵/₂
⁵/₈ + ⁵/₂ = ⁵/₈ + ⁵ˣ⁴/₈ = ⁵/₈ + ²⁰/₈ = ⁵⁺²⁰/₈ = ²⁵/₈ = 3¹/₈