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User Goose Ninja
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Recall that the associative property states that:


a(b\cdot c)=(a\cdot b)c.

Therefore, applying the associative property to the given expression we get:


8((1)/(4)\cdot(3)/(5))=(8\operatorname{\cdot}(1)/(4))(3)/(5).

The last expression is easier to compute because 4 divides 8.

Answer: Option A.

User DLiKS
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