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Evaluate: (8/5 Xx (-3)/2) + ((-3)/10 Xx 9/16) - Mathematics

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Question

Evaluate:

`(8/5 xx (-3)/2) + ((-3)/10 xx 9/16)`

Sum

Solution

`= ((8xx(-3))/(5xx2)) + (((-3)xx9)/(10xx16))`

`= (4xx(-3)/(5xx1)) + ((-3xx9)/(10xx16))`

`= -12/5 + ((-27)/160)`

2 160, 5
2 80, 5
2 40, 5
2 20, 5
2 10, 5
5 5, 5
  1

LCM of 5 and 160 = 160

`= ((-12)xx32)/(5xx32) + ((-27)xx1)/(160xx1)`

`= (-384-27)/160 = (-411)/160`

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Chapter 1: Rational Numbers - Exercise 1 (C) [Page 18]

APPEARS IN

Selina Concise Mathematics [English] Class 8 ICSE
Chapter 1 Rational Numbers
Exercise 1 (C) | Q 3.4 | Page 18
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