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It is 8 that is the gcf of 16 and 40
Greatest Common Factor .... largest expression which (evenly) divides into the given expressions.
use division by primes to find the gcf
It is the same as dividing by the original expression.
You can:* Add the same expression to both sides of an equation * Subtract the same expression from both sides * Multiply the same expression (must not be zero) to both sides * Divide both sides by the same expression (must not be zero)