Find the value of
$- 13 + (- 69) + 57 - (- 89) - (53 + (- 49))$

50

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60

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70

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80

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Solution

The correct option is B $60$
$- 13 + (- 69) + 57 - (- 89) - (53 + (- 49))$

$= - 13 - 69 + 57 + 89 - (53 - 49)$

$= - 13 - 69 + 57 + 89 - 53 + 49$

First, take all ‘ $-$ ’ terms and then take all ‘ $+$ ’ terms and add them,

$= (- 13 - 69 - 53) + (57 + 89 + 49)$

$= - 135 + 195$

$= 60$

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