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Earn +20 ptsQ: What is the most important thing about adding and subtracting fractions?
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What is the first thing you should look for when adding or subtracting fractions or mixed numbers?
common denominators.
How do you subtract improper fractions with different denominators?
It's the same thing as adding or subtracting normal fractions - just make sure both fractions have the same denominators (by either multiplying the denominators or simplifying the fraction - whichever the question needs).
Is subtracting a negative number the same thing as adding a positive number?
yes
How are addition and subtraction stories alike?
Addition and subtraction can be thought of as the same thing because subtracting a negative number is the same as adding it and adding a negative number is the same as subtracting it.
Why would the least common multiples help us with fraction addition?
Least common multiples and lowest common denominators are essentially the same thing. Once the denominators are the same, it's easier to get the correct answer when adding and subtracting fractions.
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