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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Evaluate: 3/8 + (-5)/12 + 3/7 + 3/12 + (-5)/8 + (-2)/7 - Mathematics

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प्रश्न

Evaluate:

`3/8 + (-5)/12 + 3/7 + 3/12 + (-5)/8 + (-2)/7`

बेरीज

उत्तर

`= (3/8 - 5/8) + ((-5)/12 + 3/12) + (3/7 - 2/7)`

`= (-2)/8 - 2/12 + 1/7`

`= (-1)/4 - 1/6 + 1/7`

2 4, 6, 7
2 2, 3, 7
3 1, 3, 7
7 1, 1, 7
  1, 1, 1

(LCM of 4, 6 and 7 = 2 x 2 x 3 x 7 = 84)

`= (-1xx21)/(4xx21) - (1xx14)/(6xx14) + (1xx12)/(7xx12)`

(LCM of 4, 6 and 7 = 84)

`= (-21 - 14 + 12)/84`

`= (-35 + 12)/84 = (-23)/84`

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पाठ 1: Rational Numbers - Exercise 1 (A) [पृष्ठ ९]

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सेलिना Concise Mathematics [English] Class 8 ICSE
पाठ 1 Rational Numbers
Exercise 1 (A) | Q 3.4 | पृष्ठ ९
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