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LevaKT080
@LevaKT080
September 2021
1
15
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найдите значение выражение :
1)( - 7/18 + 11/12) :( - 19/48)
2) ( - 7/16( -5/34)) : ( - 1 15/16)
3)( - 3 5/12 - 2 4/15) : (- 6 3/20)
4)( 10/21- 25/28): ( - 11/14 + 24/ 35)
5) - 2 2/3+ 2 1/3 * ( - 15 3/7 - ( - 4,8) : 4/15)
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Verified answer
1)
( - ⁷/₁₈ + ¹¹/₁₂) :( - ¹⁹/₄₈) = (- ¹⁴/₃₆ + ³³/₃₆) : (- ¹⁹/₄₈) = ¹⁹/₃₆ : (- ¹⁹/₄₈) =
¹⁹/₃₆ * (- ⁴⁸/₁₉) = - ⁴/₃ =
- 1¹/₃.
2)
( - ⁷/₁₆ * ( -⁵/₃₄)) : ( - 1¹⁵/₁₆) = ³⁵/₅₄₄ : (- 1¹⁵/₁₆) = ³⁵/₅₄₄ : (- ³¹/₁₆) =
³⁵/₅₄₄ * (- ¹⁶/₃₁) =
- ³⁵/₁₀₅₄.
3)
( - 3⁵/₁₂ - 2⁴/₁₅) : (- 6³/₂₀) = ( - 3²⁵/₆₀ - 2¹⁶/₆₀) : (- 6³/₂₀) = - 5⁴¹/₆₀
: (- 6³/₂₀) =
- ³⁴¹/₆₀ : (- ¹²³/₂₀) = - ³⁴¹/₆₀ *
(-
²⁰/₁₂₃) =
³⁴¹/₃₆₉.
4)
( ¹⁰/₂₁- ²⁵/₂₈) :( - ¹¹/₁₄ + ²⁴/₃₅) = ( ⁴⁰/₈₄- ⁷⁵/₈₄
) :( -
⁵⁵/₇₀ + ⁴⁸/₇₀
) = -
³⁵/₈₄ :(- ⁷/₇₀)= - ³⁵/₈₄ : (- ¹/₁₀) = - ³⁵/₈₄ * (- 10) =
¹⁷⁵/₄₈.
5)
- 2²/₃+ 2¹/₃ * (- 15³/₇ - (- 4,8) : ⁴/₁₅) = - 2²/₃+ 2¹/₃ *( - 15³/₇ - (- 4⁴/₅ : ⁴/₁₅)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- ²⁴/₅ : ⁴/₁₅)) = - 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- ²⁴/₅ * ¹⁵/₄
)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- 18)) = - 2²/₃+ 2¹/₃ * ( - 15³/₇ + 18)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ + 17⁷/₇)) = - 2²/₃+ 2¹/₃ * 2⁴/₇ = - 2²/₃ + ⁷/₃ * ¹⁸
/₇ =
- 2²/₃ + 6 = -2²/₃ + 5³/₃ =
3¹/₃.
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LevaKT080
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Answers & Comments
Verified answer
1)( - ⁷/₁₈ + ¹¹/₁₂) :( - ¹⁹/₄₈) = (- ¹⁴/₃₆ + ³³/₃₆) : (- ¹⁹/₄₈) = ¹⁹/₃₆ : (- ¹⁹/₄₈) =¹⁹/₃₆ * (- ⁴⁸/₁₉) = - ⁴/₃ = - 1¹/₃.
2)( - ⁷/₁₆ * ( -⁵/₃₄)) : ( - 1¹⁵/₁₆) = ³⁵/₅₄₄ : (- 1¹⁵/₁₆) = ³⁵/₅₄₄ : (- ³¹/₁₆) =
³⁵/₅₄₄ * (- ¹⁶/₃₁) = - ³⁵/₁₀₅₄.
3)( - 3⁵/₁₂ - 2⁴/₁₅) : (- 6³/₂₀) = ( - 3²⁵/₆₀ - 2¹⁶/₆₀) : (- 6³/₂₀) = - 5⁴¹/₆₀ : (- 6³/₂₀) =
- ³⁴¹/₆₀ : (- ¹²³/₂₀) = - ³⁴¹/₆₀ * (- ²⁰/₁₂₃) = ³⁴¹/₃₆₉.
4)( ¹⁰/₂₁- ²⁵/₂₈) :( - ¹¹/₁₄ + ²⁴/₃₅) = ( ⁴⁰/₈₄- ⁷⁵/₈₄) :( - ⁵⁵/₇₀ + ⁴⁸/₇₀) = -³⁵/₈₄ :(- ⁷/₇₀)= - ³⁵/₈₄ : (- ¹/₁₀) = - ³⁵/₈₄ * (- 10) = ¹⁷⁵/₄₈.
5)- 2²/₃+ 2¹/₃ * (- 15³/₇ - (- 4,8) : ⁴/₁₅) = - 2²/₃+ 2¹/₃ *( - 15³/₇ - (- 4⁴/₅ : ⁴/₁₅)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- ²⁴/₅ : ⁴/₁₅)) = - 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- ²⁴/₅ * ¹⁵/₄)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ - (- 18)) = - 2²/₃+ 2¹/₃ * ( - 15³/₇ + 18)) =
- 2²/₃+ 2¹/₃ * ( - 15³/₇ + 17⁷/₇)) = - 2²/₃+ 2¹/₃ * 2⁴/₇ = - 2²/₃ + ⁷/₃ * ¹⁸/₇ =
- 2²/₃ + 6 = -2²/₃ + 5³/₃ = 3¹/₃.