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Subtract: from-625 from -85 - Mathematics

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Question

Subtract:

`(- 6)/25  "from"  (-8)/5`

Sum

Solution

`(- 6)/25  "from"  (-8)/5`

This means: `(-8)/5 - (-6)/25`

Subtracting a negative is equivalent to addition:

`(-8)/5 - (-6)/25 = (-8)/5 + 6/25`

The least common denominator (LCD) of 5 and 25 is 25. Rewrite the fractions with a denominator of 25:

`(-8)/5 = (-8xx5)/(5xx5) = (-40)/25`

Now the expression becomes: `(-40)/25 + 6/25`

Add the numerators: `(-40)/25 + 6/25 = (-40+6)/25 = (-34)/25`

`(-34)/25`

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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 6.2
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