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Divide the Sum of \Frac { 3 }{ 7 } and \Frac { -5 }{ 14 } by \Frac { -1 }{ 2 }. - Mathematics

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Question

Divide the sum of `3/7` and `(-5)/14` by `(-1)/2`

Sum

Solution

`[3/7+((-5)/14)]÷(-1)/2`

∴ LCM of 7 and 14 =14

=`[3/7xx2/2-5/14]÷(-1)/2`

=`[(6-5)/14]÷(-1)/2`

=`1/14xx(-2)/1`

=`(1xx(-1))/(7xx1)=(-1)/7`

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Chapter 1: Rational Numbers - Exercise 1 (D) [Page 22]

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Selina Concise Mathematics [English] Class 8 ICSE
Chapter 1 Rational Numbers
Exercise 1 (D) | Q 10 | Page 22
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