Best Answer

Yes the bottom has to be the same when subtracting fractions. The bottom (or denominator) tells you what you're working with. You cannot subtract thirds from halves just as you cannot subtract Oranges from tissues.

User Avatar

Wiki User

โˆ™ 2011-06-19 15:52:01
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: When subtracting fractions does the bottom have to be the same?
Write your answer...
Related questions

Why is it helpful to find common factors for 2 nummbers?

This can be especially helpful if you are adding or subtracting fractions, so the bottom number on both fractions will be the same

How are adding fractions different?

When adding or subtracting fractions their denominators must be the same

How are adding and subtracting fractions similar?

Subtracting a fraction is the same as adding its negative.

What is the common denononator?

In fractions, the denominator is the bottom number. When adding or subtracting fractions, it is helpful if all the denominators are the same. To do this, we look for common denominators, which is the same process as finding the least common multiple.

Before adding or subtracting Why are fractions turned into like fractions?

They have to have the same denominator.

What are the rules for adding fractions?

Ensure that the denominators are the same when adding or subtracting fractions.

How do you minnous fractions?

To subtract fractions with like denominators, subtract the numerators , and write the difference over the denominator. Example : Find 45โˆ’25 . Since the denominators are the same, subtract the numerators.

What do you notice about the denominator when subtracting like fractions?

By the definition of like fractions, the denominators are the same.

What is the rule for subtracting fractions?

First, change it so that the two fractions have the same denominator (by changing the fractions into equivalent fractions). Once the two fractions have the same denominator, it is simply a case of subtracting the numerators, leaving the denominator the same. Finally, reduce the fraction to its lowest terms (if possible).

How do you subtract fractions with negative fractions?

Subtracting a negative fraction is the same as adding its positive equivalent.

Fractions Have The Same Denominators?

Not always but they need to have the same denominators when adding or subtracting them.

How do you subtract mixed fractions when they have the same denominator?

The numerator of the answer is the result of subtracting the numerators of the fractions, and the denominator of the fraction is the same as the common denominator.

How do you find a multiple when subtracting fractions?

Same as adding, multiplying, and dividing.

How can you get the simplest form for subtracting fractions?

just divide the number on the top and the number at the bottom with the same number. keep on dividing until you can't divide anymore

Why are equivalent fractions important when adding and subtracting fractions?

Because to add or subtract two fractions you first have to find equivalent fractions for both which have the same denominator.

What is the best method for subtracting fractions?

The three-step method is the easiest way to subtract fractions. First, ensure that the bottom numbers, or denominators are the same. Then, subtract the numerators.Place the answer over the same denominator. All one needs to do now is simplify the fraction.

What must you do first before adding or subtracting unlike fractions?

you must make the fractions equivalent and with the same denomenator

What do adding and subtracting mixed numbers means?

To combine the fractions or subtract the fractions. Same method with mixed numbers.

What is the definition of adding and subtracting fractions with unlike denominators?

What is the definition of Adding and Subtracting Like Fractions

When adding or subtracting fractions do you have to have the numerator the same or denominator?

The denominators must be the same, the numerators can be different.

What are the steps to subtracting fractions?

Same as for addition. Mainly, you have to convert the fractions to equivalent fractions that have the same denominator. After that, it is easy: just subtract the numerators and put the result on top of the common denominator.

Why do the denominators have to be the same for both fractions when adding and subtracting?

It makes it easier. So both of the fractions are proportional to each other.

Who invented adding and subtracting fractions?


When subtracting or adding numbers in scientific notation why do the exponents need to be the same?

This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.

What does subtracting fractions mean?

It means you have to subtract fractions.

Study guides

Create a Study Guide