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Making sure the denominators are the same.

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Q: What is the most important thing about adding and subtracting fractions?
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What is the most important thing you can say about adding or subtracting fractions?

the most important thing is to change the denominators so u can make common denominators

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).

Subtraction with negative fractions?

Subtracting a negative number is the same as adding the positive version. So 3- (-4) = 3+7. The same thing is true of all numbers, including fractions. So just add the fractions like you would normally do.

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.

Is subtracting a negative number the same thing as adding a positive number?


What is the differeince between common factors and common multiples?

Common factors go into the numbers, the numbers go into common multiples.

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.

How much is 336 plus -16?


Why is subtracting a negative number a positive number?

It is a double negative, subtracting is essentially adding a negative, therefore subtracting would be a negative negative number, which would be a positive, my mom helped me remember it by thinking if a bad thing happened to a bad person, it would be good, if a good thing happened to a good person it would be good, if a bad thing happened to a good person it would be bad, ect.

What is adding fractions with unlike denominators?

I'm really sorry I've done this before but i just totally am thinking the same exact thing!

What does -9 plus -9 equals?