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NARA [144]
3 years ago
11

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

Mathematics
2 answers:
Alik [6]3 years ago
6 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 <span><span><span>20</span>20</span><span>20</span></span>.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 <span><span><span>2×2×5=20</span>2\times 2\times 5=20</span><span>2×2×5=20</span></span>.
galina1969 [7]3 years ago
4 0

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



Answer: 2.2

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