Chapter 5: Problem 94
Simplify. $$6\left(\frac{1}{3}+\frac{1}{2}\right)$$
Short Answer
Expert verified
The simplified value is 5.
Step by step solution
01
Understand the Expression
The expression given is \(6\left(\frac{1}{3}+\frac{1}{2}\right)\). This means we are first adding \(\frac{1}{3}\) and \(\frac{1}{2}\), and then multiplying the result by 6.
02
Find a Common Denominator
To add the fractions \(\frac{1}{3}\) and \(\frac{1}{2}\), we need a common denominator. The least common multiple of 3 and 2 is 6.
03
Convert Fractions to Have the Same Denominator
Convert \(\frac{1}{3}\) to \(\frac{2}{6}\) by multiplying both the numerator and the denominator by 2. Convert \(\frac{1}{2}\) to \(\frac{3}{6}\) by multiplying both the numerator and the denominator by 3.
04
Add the Fractions
Now that the fractions have the same denominator, add them together: \(\frac{2}{6} + \frac{3}{6} = \frac{5}{6}\).
05
Multiply by 6
Multiply the result of the fraction addition by 6: \(6 \times \frac{5}{6}\).
06
Simplify the Expression
Cancel out the 6 in the numerator and the denominator to simplify: \(\frac{6 \times 5}{6} = 5\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Understanding and Finding a Common Denominator
When you're working with fractions, especially when adding them, finding a common denominator is super important. A common denominator is a number that is a multiple of all the denominators involved.
For two fractions with denominators 3 and 2, like in our exercise, you want to find the least common multiple (LCM) of these numbers. The LCM of 3 and 2 is 6.
Why? Because 6 is the smallest number that both 3 and 2 can divide without leaving a remainder. This common denominator allows you to rewrite each fraction so they can easily be added together.
For two fractions with denominators 3 and 2, like in our exercise, you want to find the least common multiple (LCM) of these numbers. The LCM of 3 and 2 is 6.
Why? Because 6 is the smallest number that both 3 and 2 can divide without leaving a remainder. This common denominator allows you to rewrite each fraction so they can easily be added together.
- Multiply the top and bottom of \(\frac{1}{3}\) by 2 to get \(\frac{2}{6}\).
- Multiply the top and bottom of \(\frac{1}{2}\) by 3 to get \(\frac{3}{6}\).
Adding Fractions with a Common Denominator
Adding fractions becomes straightforward once you have a common denominator. After converting \(\frac{1}{3}\) and \(\frac{1}{2}\) to \(\frac{2}{6}\) and \(\frac{3}{6}\) respectively, you're ready to add them!
The denominators are now the same, so you can focus on adding the numerators alone.
Adding fractions with a common denominator is like simple addition where you only add the top parts (numerators) while keeping the bottom (the common-sized denominator) the same.
The denominators are now the same, so you can focus on adding the numerators alone.
- Think of it like counting pieces: \(2\) parts out of \(6\), plus \(3\) parts out of \(6\) means \(5\) parts out of \(6\).
Adding fractions with a common denominator is like simple addition where you only add the top parts (numerators) while keeping the bottom (the common-sized denominator) the same.
Multiplying Fractions and Understanding Simplification
After adding fractions, in our exercise, we multiplied the sum, \(\frac{5}{6}\), by 6. Multiplying a fraction by a whole number is like multiplying the whole number by the fraction's numerator while dividing by the denominator.
- So, \(6 \times \frac{5}{6}\) means \(\frac{6 \times 5}{6}\).
- Here, 6 in the numerator and denominator cancel each other out effectively. It's like taking a pizza cut into six slices, where multiplying by six is just taking back all slices. So, you're left with the slices numbered.\(5\).