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28 December, 02:08

Evaluate 2/5 of 3 1/2 + 4/5

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Answers (2)
  1. 28 December, 02:09
    0
    Method 1: By Listing MultiplesList out all multiples of each denominator, and find the first common one. Multiples of 5 : 5, 10, 15, 20, ...

    Multiples of 4 : 4, 8, 12, 16, 20, ...

    Therefore, the LCD is 20 20 20. Method 2: By Prime FactorsList all prime factors of each denominator, and find the union of these primes. Prime Factors of 5 : 5

    Prime Factors of 4 : 2, 2

    Therefore, the LCD is 2*2*5=20 2/times 2/times 5=20 2*2*5=20.
  2. 28 December, 02:14
    0
    2/5 of 3 1/2 + 4/5=

    Answer: 2.2
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