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Earn +20 ptsQ: What is always needed when adding and subtracting fractions?
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Do you need a common denominator for dividing fractions?
No only when adding or subtracting fractions a common denominator is needed
What is the meaning of LCD Fraction?
The Lowest Common Denominator is needed when adding or subtracting fractions.
What information does the least common multiple of two numbers provide in a problem?
When adding or subtracting fractions with different denominators the lowest common denominator is needed and is found by finding the lowest common multiple of the denominators.
Why do you estimate when adding or subtracting decimal numbers?
In more than 40 years as a mathematician, I have never needed to do so.
When is a common denominator needed and when is one not needed?
A common denominator is required to add or subtract fractions and not otherwise.
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