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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Add, the pair of rational numbers, given below, and show that their addition (sum) is also a rational number 9/(-4) " and" (-3)/8 - Mathematics

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प्रश्न

Add, the pair of rational numbers, given below, and show that their addition (sum) is also a rational number

`9/(-4) " and" (-3)/8`

बेरीज

उत्तर

`9/(-4) + (-3)/8`

2 4, 8
2 2, 4
2 2, 2
  1, 1

LCM of 4 and 8 = 2 x 2 x 2 = 8

`= (-9xx 2)/(4xx2) - (3xx1)/(8xx1)`

(LCM of 4 and 8 = 8)

`= (-18-3)/8 = (-21)/8`

Which is a rational number

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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 1.7 | पृष्ठ ९
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