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655005bratz
@655005bratz
October 2021
2
25
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Найдите значение выражения:
а)6/13+4/13-8/13
б)7цел.13/15-(2цел.7/15+3цел.4/15)
в)(9цел.12/25-8цел. 16/25)+4цел. 17/25
P.S .../... дробь, ...цел. .../... смешанная дробь.
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Inf777
Verified answer
См. в приложении.
----------------------------
8 votes
Thanks 6
ПростоЛёка
Verified answer
А) ⁶/₁₃+⁴/₁₃-⁸/₁₃ = ⁶⁺⁴⁻⁸/₁₃ = ¹⁰⁻⁸/₁₃ = ²/₁₃
б) 7
¹³/₁₅-(2⁷/₁₅+3⁴/₁₅
) =
2⁷/₁₅+3⁴/₁₅ = 5⁷⁺⁴/₁₅ = 5¹¹/₁₅
7¹³/₁₅ - 5¹¹/₁₅ = 2¹³⁻¹¹/₁₅ = 2²/₁₅
в)(9
¹²/₂₅-8¹⁶/₂₅)+4¹⁷/₂₅ =
9¹²/₂₅-8¹⁶/₂₅ = 8³⁷/₂₅-8¹⁶/₂₅ = ³⁷/₂₅ - ¹⁶/₂₅ = ³⁷⁻¹⁶/₂₅ = ²¹/₂₅
²¹/₂₅ +4¹⁷/₂₅ = 4²¹⁺¹⁷/₂₅ = 4³⁸/₂₅ = 5¹³/₂₅
6 votes
Thanks 12
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Answers & Comments
Verified answer
См. в приложении.----------------------------
Verified answer
А) ⁶/₁₃+⁴/₁₃-⁸/₁₃ = ⁶⁺⁴⁻⁸/₁₃ = ¹⁰⁻⁸/₁₃ = ²/₁₃б) 7¹³/₁₅-(2⁷/₁₅+3⁴/₁₅) =
2⁷/₁₅+3⁴/₁₅ = 5⁷⁺⁴/₁₅ = 5¹¹/₁₅
7¹³/₁₅ - 5¹¹/₁₅ = 2¹³⁻¹¹/₁₅ = 2²/₁₅
в)(9¹²/₂₅-8¹⁶/₂₅)+4¹⁷/₂₅ =
9¹²/₂₅-8¹⁶/₂₅ = 8³⁷/₂₅-8¹⁶/₂₅ = ³⁷/₂₅ - ¹⁶/₂₅ = ³⁷⁻¹⁶/₂₅ = ²¹/₂₅
²¹/₂₅ +4¹⁷/₂₅ = 4²¹⁺¹⁷/₂₅ = 4³⁸/₂₅ = 5¹³/₂₅