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Questions and Answers
What does it mean to simplify a fraction?
What does it mean to simplify a fraction?
- To find equivalent fractions with smaller numerator and denominator values (correct)
- To multiply the numerator and denominator by the same number
- To make the fraction bigger
- To convert the fraction to a decimal
How can you compare two fractions to determine which one is larger?
How can you compare two fractions to determine which one is larger?
- By finding a common denominator
- By dividing the fractions
- By adding the fractions together
- By looking at which fraction has a larger numerator (correct)
When adding fractions with unlike denominators, what is the first step?
When adding fractions with unlike denominators, what is the first step?
- Multiply the numerators
- Divide the denominators
- Find the least common denominator (correct)
- Add the denominators together
In comparing fractions, if one fraction has a smaller denominator than another, what does this imply?
In comparing fractions, if one fraction has a smaller denominator than another, what does this imply?
What does it mean if two fractions are said to be equivalent?
What does it mean if two fractions are said to be equivalent?
What is the process called that finds a multiple of each denominator to act as a new shared denominator?
What is the process called that finds a multiple of each denominator to act as a new shared denominator?
In the expression $\frac{3}{4} + \frac{7}{9}$, what is the equivalent fraction of $\frac{3}{4}$ after finding a common denominator?
In the expression $\frac{3}{4} + \frac{7}{9}$, what is the equivalent fraction of $\frac{3}{4}$ after finding a common denominator?
When subtracting fractions with unlike denominators, what is the first step to take?
When subtracting fractions with unlike denominators, what is the first step to take?
What may be the result when adding or subtracting fractions with unlike denominators?
What may be the result when adding or subtracting fractions with unlike denominators?
Why is understanding how to simplify, compare, add, and subtract fractions with unlike denominators important?
Why is understanding how to simplify, compare, add, and subtract fractions with unlike denominators important?
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Study Notes
Simplifying Fractions, Comparing, Adding, and Subtracting With Unlike Denominators
Fractions play a crucial role in mathematics by helping us represent parts of wholes. As we delve into simplifying, comparing, and performing operations like addition and subtraction involving fractions, let's navigate these concepts step-by-step.
Simplifying Fractions
To simplify a fraction means making it more manageable—in other words, finding equivalent fractions with smaller numerator and denominator values while still maintaining their ratio. For example, (\frac{8}{16}) is equivalent to (\frac{1}{2}), since they both have (1) divided by some number ((8) and (16) respectively). To find common factors between the numerator and denominator and cancel them out helps simplify a fraction.
Comparing Fractions
When you want to determine whether one fraction is larger or smaller than another, you need to compare their relative size using a visual model like a number line or place value chart. If a fraction has a larger numerator or a smaller denominator, or if it lies farther from zero on any given number line, it represents a bigger part of its whole compared to other fractions.
Addition and Subtraction of Fractions
As you start working with fractions having different denominators (unlike denominators), you might wonder how to perform arithmetic operations like addition and subtraction. One approach involves a process called common denominator, which finds a multiple of each denominator that can act as a new shared denominator. Once this common denominator is identified, the original fractions get expressed as equivocal fractions, allowing simple addition or subtraction. Here’s an example of how to add two fractions with unlike denominators:
[ \begin{align*} &\frac{3}{4} + \frac{7}{9}\ &= \frac{3\cdot 9}{4\cdot 9} + \frac{7\cdot 4}{9\cdot 4}\ &= \frac{27}{36} + \frac{28}{36} \ &= \frac{55}{36} \ \end{align*} ]
Similarly, subtraction follows the same principle, where you adjust the second term to fit under the first term's denominator before calculating the difference. These processes may lead to rationalized fractions or mixed numbers when necessary.
In summary, understanding the basics of simplification, comparison, addition, and subtraction of fractions with unlike denominators will equip you with essential tools needed for success in algebra and higher math courses.
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