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Easy

Question

Evaluate 3 over 5 plus 7 over 3 plus fraction numerator negative 11 over denominator 5 end fraction plus fraction numerator negative 2 over denominator 3 end fraction

hintHint:

Find LCM of the given fractions and then add.

The correct answer is: 1/15


    To find: 3 over 5 plus 7 over 3 plus fraction numerator negative 11 over denominator 5 end fraction plus fraction numerator negative 2 over denominator 3 end fraction
    Here by taking the LCM of denominators 5 and 3, we have 15 as LCM.
    On multiplying 3 over 5 with 3, we get fraction numerator 3 cross times 3 over denominator 5 cross times 3 end fraction equals 9 over 15
    On multiplying 7 over 3 with 5, we get fraction numerator 7 cross times 5 over denominator 3 cross times 5 end fraction equals 35 over 15
    On multiplying fraction numerator negative 11 over denominator 5 end fraction with 3, we get fraction numerator negative 11 cross times 3 over denominator 5 cross times 3 end fraction equals fraction numerator negative 33 over denominator 15 end fraction
    On multiplying fraction numerator negative 2 over denominator 3 end fraction with 5, we get fraction numerator negative 2 cross times 5 over denominator 3 cross times 5 end fraction equals fraction numerator negative 10 over denominator 15 end fraction
    Now we have 4 fractions with the same denominators.
    On adding, we have 9 over 15 plus 35 over 15 plus fraction numerator negative 33 over denominator 15 end fraction plus fraction numerator negative 10 over denominator 15 end fraction equals 1 over 15
    Hence 3 over 5 plus 7 over 3 plus fraction numerator negative 11 over denominator 5 end fraction plus fraction numerator negative 2 over denominator 3 end fraction equals 1 over 15

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