No! You can multiply fractions without common denominators. For example:
2/4 + 7/1
Multiply straight across.
The answer is then 14/4 or 3.5
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No, you do not need to find a common denominator when multiplying fractions. To multiply fractions, you simply multiply the numerators together and the denominators together. However, finding a common denominator can be helpful when simplifying the resulting fraction.
You don't need a common denominator to divide fractions.
Yes. You need common denominators if you want to:Add fractionsSubtract fractionsCompare fractions ("which is larger?")You do not need common denominators to multiply or divide fractions. Thus, in the case of fractions, multiplication and division is actually easier than addition and subtraction.
No only when adding or subtracting fractions a common denominator is needed
No.
No, You only need a common denominator when adding or subtracting fractions.