Cancelling out common factors means you are working with smaller numbers. It is usually, but not always, beneficial.
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That is correct. It is easier to simplify the fraction before multiplying all the factors in the numerator and the denominator.That is correct. It is easier to simplify the fraction before multiplying all the factors in the numerator and the denominator.That is correct. It is easier to simplify the fraction before multiplying all the factors in the numerator and the denominator.That is correct. It is easier to simplify the fraction before multiplying all the factors in the numerator and the denominator.
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Because common denominators allow adding and subtracting of numerators. Improper fractions also have simplified rules over mixed numbers when performing multiplication and division.
if you have mixed numbers you make them into improper fractions before you multiply
-4 X -4 = (+)16 Remember the table multiplying/dividing negative/positive numbers. X + = + X - = - X + = - X - = + NB If no sign is before the number, then read it as 'plus(+)'.