2целых13/30-(1цлая1/10+1/5). Created by мак161. matematika-ru

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AlexKolm2015 2¹³/₃₀-(1¹/₁₀+¹/₅) = 1²/₁₅
1) 1¹/₁₀+¹/₅ = ¹¹/₁₀+¹/₅ = ¹¹/₁₀+²/₁₀ = ¹¹⁺²/₁₀ = ¹³/₁₀
2) 2¹³/₃₀ - ¹³/₁₀=⁷³/₃₀ - ¹³/₁₀=⁷³/₃₀-¹³ˣ³/₃₀=⁷³/₃₀-³⁹/₃₀=⁷³⁻³⁹/₃₀=³⁴/₃₀=1⁴/₃₀=1²/₁₅

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2 13/30 - (1 1/10 + 1/5) = 73/30 - (11/10 + 2/10) = 73/30 - 13/10 = 73/30 - 39/30 = 34/30 = 17/15 = 1 2/15

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математика 5 класса номер 1028 а...

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