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Evaluate: (- 9)/4 + 13/3 + 25/6 - Mathematics

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Question

Evaluate: `(- 9)/4 + 13/3 + 25/6`

Sum

Solution

`(- 9)/4 + 13/3 + 25/6`

LCM of 4, 3 and 6 is 12.

`(-9)/4 => (-9)/4 xx 3/3 = (- 27)/12`


`13/3 => 13/3 xx 4/4 = 52/12`


`25/6 => 25/6 xx 2/2 = 50/12`


`= (- 27 + 52 + 50)/12`


`= 75/12 = 25/4`


`therefore (- 9)/4 + 13/3 + 25/6 = 25/4`

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Concept for Problem Solving Using Operations on Rational Numbers
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Chapter 2: Rational Numbers - Exercise 2 (C)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 2 Rational Numbers
Exercise 2 (C) | Q 4.2
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