anonymous
  • anonymous
ah
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
'transform' all divisions to the same number under the line. Try to find the smallest common denominator, which is '20' here. 3/5 equals 12/12, for example. Once all of these divisions have the same denominator, you can easily add the top part and calculate the sum.
anonymous
  • anonymous
Sorry, not 12/12, but 12/20...you'll get it anyway.
AkashdeepDeb
  • AkashdeepDeb
Try taking LCM! The lowest common multiply here is 20 right? Because it is divisible by ALL OTHER DENOMINATORs! :) SO \[\frac{ 3 }{ 5 } + \frac{ 1 }{ 10 } - \frac{ 9 }{ 20 }\] So after taking LCM we get! \[\frac{ 3X4 }{ 5X4 } + \frac{ 1X2 }{ 10X2 } - \frac{ 9X1 }{ 20X1 }\] Now just simply add and subtract them! \[\frac{ 3X4 + 1X2 - 9 }{ 20 }\] \[\frac{ 5 }{ 20 } = \frac{ 1 }{ 4 }\] Get this? :)

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AkashdeepDeb
  • AkashdeepDeb
:)

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