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How do you make the denominators the same in fractions when subtracting?
Wiki User
∙ 13y ago
the same way you do when adding. Find a LCM(lowest common multiple) then do what you did to each denominator to the numerators. Example: 1/2 - 1/3. the LCM here for 2 & 3 is 6 so rewrite the problem with how you got 6. 1/2=3/6; 1/3=2/6
The answer then becomes 1/6
Wiki User
∙ 13y ago
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What are the rules for adding fractions?
Ensure that the denominators are the same when adding or subtracting fractions.
How are adding fractions different?
When adding or subtracting fractions their denominators must be the same
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).
What do you notice about the denominator when subtracting like fractions?
By the definition of like fractions, the denominators are the same.
How do you do a subtracting problem with mixed numbers?
Convert them to improper fractions, make sure the denominators are the same and fire away.
Fractions Have The Same Denominators?
Not always but they need to have the same denominators when adding or subtracting them.
What are the rules for adding fractions?
Ensure that the denominators are the same when adding or subtracting fractions.
How are adding fractions different?
When adding or subtracting fractions their denominators must be the same
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).
Can you multiply fractions that have a different demonminator?
Yes. When multiplying and dividing fractions your denominators do not have to be the same. The denominators only haveto be the same if you are subtracting or adding them.
What do you notice about the denominator when subtracting like fractions?
By the definition of like fractions, the denominators are the same.
How do you do a subtracting problem with mixed numbers?
Convert them to improper fractions, make sure the denominators are the same and fire away.
What is the process of subtracting fractions?
If the denominators are the same, subtract the numerators. If the denominators are different, convert them to equivalent fractions with a common denominator and subtract the numerators.
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.
Are the steps for like and unlike denominators the same or different?
It depends what you are doing with the fractions. If you are multiplying or dividing fraction, the denominators do not need to be the same and the calculation can be carried out immediately. If you are adding or subtracting fractions, the denominators must be the same; if you have different denominators, the fractions must first be changed into equivalent fractions with the same denominator. When the denominators are the same (or have been made the same as equivalent fractions from being different) the calculation can be carried out.
How do you check you math with adding fractions?
When adding or subtracting fractions first make sure that the denominators are the same if they aren't then find the lowest common denominator and alter the fractions accordingly
What is the most important thing about adding and subtracting fractions?
Making sure the denominators are the same.
