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Ok so say you have a problem like 3/6 -7/5. You need a common denomonator, in this case 30. you get this by multiplying the first fraction by 5/5 which makes the 'new' fraction 15/30. You then multiply the next fraction by 6/6 to get 42/30.
you then subtract the numeraters and the denominator is unchanged. the answer would be -27/30 (15-42=-27)
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∙ 13y ago
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How are adding and subtracting fractions similar?
Subtracting a fraction is the same as adding its negative.
How are adding fractions different?
When adding or subtracting fractions their denominators must be the same
What are the rules for adding fractions?
Ensure that the denominators are the same when adding or subtracting fractions.
Before adding or subtracting two fractions they are converted into like fractions Explain with examples why this is necessary?
Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
What did you learn from adding and subtracting fractions?
I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
What is the definition of adding and subtracting fractions with unlike denominators?
What is the definition of Adding and Subtracting Like Fractions
How are adding and subtracting fractions similar?
Subtracting a fraction is the same as adding its negative.
What types of problems can be solved using the the LCM?
Anything having to do with adding or subtracting unlike fractions.
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
Why do you find the LCM of numbers?
Finding the LCM helps in the process of adding and subtracting unlike fractions.
Who invented adding and subtracting fractions?
Me
Before adding or subtracting two fractions they are converted into like fractions Explain with examples why this is necessary?
Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
Adding and subtracting fractions?
Pulled and mulled
What is the use of LCM?
When adding or subtracting unlike fractions, the LCM process is used to find the least common denominator.
What did you learn from adding and subtracting fractions?
I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
How is subtracting fractions like adding fractions?
You need a common denominator for both.
