Addition of Fractions Practice Problems with Solutions

Master adding fractions with common denominators, different denominators, and mixed numbers. Interactive practice problems with step-by-step solutions.

📚What You'll Master in This Practice
  • Find common denominators using simplification and multiplication methods
  • Add fractions with same denominators by combining numerators
  • Solve addition problems with different denominators step-by-step
  • Add three or more fractions using strategic pairing techniques
  • Simplify fraction sums to lowest terms and mixed numbers
  • Apply fraction addition rules to real-world problem scenarios

Understanding Addition of Fractions

Complete explanation with examples

To add fractions, we must find the common denominator simplifying, expanding, or multiplying the denominators.
Then, you only need to add the numerators to get the result.

Detailed explanation

Practice Addition of Fractions

Test your knowledge with 56 quizzes

\( \frac{2}{6}+\frac{3}{6}= \)

Examples with solutions for Addition of Fractions

Step-by-step solutions included
Exercise #1

58+18= \frac{5}{8}+\frac{1}{8}=

Step-by-Step Solution

To solve the problem of 58+18 \frac{5}{8} + \frac{1}{8} , follow these steps:

  • Step 1: Identify that both fractions have the same denominator: 8.
  • Step 2: Since the denominators are the same, add the numerators to get a new numerator: 5+1=6 5 + 1 = 6 .
  • Step 3: The resulting fraction is 68 \frac{6}{8} .
  • Step 4: Simplify the fraction if needed; 68 \frac{6}{8} simplifies to 34 \frac{3}{4} , which is a reduced form.

Therefore, the solution for the fraction addition 58+18 \frac{5}{8} + \frac{1}{8} is 68 \frac{6}{8} , which simplifies to 34 \frac{3}{4} , but considering the choices given, the answer choice corresponds to 68 \frac{6}{8} , which is choice 3.

Answer:

68 \frac{6}{8}

Video Solution
Exercise #2

14+34= \frac{1}{4}+\frac{3}{4}=

Step-by-Step Solution

To solve the problem of adding the fractions 14 \frac{1}{4} and 34 \frac{3}{4} , we can follow these steps:

  • Step 1: Identify that both fractions share the same denominator of 4.
  • Step 2: Add the numerators directly: 1+3=4 1 + 3 = 4 .
  • Step 3: Retain the common denominator, giving us 44 \frac{4}{4} .
  • Step 4: Simplify the result, 44=1 \frac{4}{4} = 1 .

Therefore, the sum of 14 \frac{1}{4} and 34 \frac{3}{4} is 1 1 .

Answer:

1 1

Video Solution
Exercise #3

18+68= \frac{1}{8}+\frac{6}{8}=

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify that both fractions have the same denominator.
  • Step 2: Add the numerators of the two fractions.
  • Step 3: Keep the common denominator unchanged.
  • Step 4: Express the result as a simplified fraction if necessary.

Now, let's work through each step:
Step 1: Both fractions are 18\frac{1}{8} and 68\frac{6}{8}, with a common denominator of 8.
Step 2: Add the numerators: 1+6=71 + 6 = 7.
Step 3: Use the common denominator to create the sum: 78\frac{7}{8}.
Step 4: The fraction 78\frac{7}{8} is already in its simplest form, as 7 and 8 have no common factors other than 1.

Therefore, the solution to the problem is 78 \frac{7}{8} .

Answer:

78 \frac{7}{8}

Video Solution
Exercise #4

19+29= \frac{1}{9}+\frac{2}{9}=

Step-by-Step Solution

To solve the problem of adding the fractions 19 \frac{1}{9} and 29 \frac{2}{9} , we proceed with the following steps:

  • Step 1: Verify that the fractions have the same denominator.
    Both fractions, 19 \frac{1}{9} and 29 \frac{2}{9} , have a common denominator of 9.
  • Step 2: Add the numerators.
    The numerators are 1 and 2, respectively. So, 1+2=3 1 + 2 = 3 .
  • Step 3: Write the result over the common denominator.
    This gives us the fraction 39 \frac{3}{9} .
  • Step 4: Simplify the fraction if possible.
    The fraction 39 \frac{3}{9} can be simplified by dividing the numerator and the denominator by their greatest common divisor, which is 3: 39=3÷39÷3=13 \frac{3}{9} = \frac{3 \div 3}{9 \div 3} = \frac{1}{3}

Therefore, the solution to the problem is 13 \frac{1}{3} .

Answer:

13 \frac{1}{3}

Video Solution
Exercise #5

24+14= \frac{2}{4}+\frac{1}{4}=

Step-by-Step Solution

To solve this problem, let's follow these steps:

  • Step 1: Identify that both fractions 24\frac{2}{4} and 14\frac{1}{4} have the same denominator.
  • Step 2: Add the numerators together while keeping the denominator the same.
  • Step 3: Simplify the resulting fraction if possible.

Now, let's perform these steps:

Step 1: The denominator for both fractions is 4, so we can proceed with addition.

Step 2: Add the numerators: 2+1=32 + 1 = 3.

Step 3: Place the result over the common denominator: 34\frac{3}{4}.

Therefore, the result of adding 24+14\frac{2}{4} + \frac{1}{4} is 34\frac{3}{4}.

This matches the correct choice, which is 34\frac{3}{4}.

Answer:

34 \frac{3}{4}

Video Solution

Frequently Asked Questions

How do you add fractions with different denominators?

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To add fractions with different denominators, first find a common denominator by either expanding one fraction or multiplying both denominators together. Then multiply both numerator and denominator of each fraction as needed to get the same denominator, and finally add only the numerators while keeping the common denominator.

What is the easiest way to find a common denominator when adding fractions?

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The easiest method is to multiply the first fraction by the denominator of the second fraction, and multiply the second fraction by the denominator of the first fraction. This always works and doesn't require finding the least common multiple.

Why don't you add denominators when adding fractions?

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You don't add denominators because they represent the size of the parts, not the quantity. When fractions have the same denominator, you're adding pieces of the same size, so only the numerators (number of pieces) get added together.

How do you add three fractions with different denominators?

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First, find the easiest pair of fractions to combine by looking for denominators that are multiples of each other. Add those two fractions first, then find a common denominator between your result and the third fraction to complete the addition.

What should I do after adding fractions - do I need to simplify?

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Yes, always check if your answer can be simplified to lowest terms. Look for common factors in the numerator and denominator and divide both by their greatest common factor. You can also convert improper fractions to mixed numbers if needed.

Can you add fractions when one denominator is a multiple of another?

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Yes, this is actually the easiest case. The larger denominator becomes your common denominator. Simply expand the fraction with the smaller denominator by multiplying both numerator and denominator by the appropriate factor to match the larger denominator.

What are common mistakes when adding fractions?

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Common mistakes include: 1) Adding denominators instead of finding a common denominator, 2) Forgetting to multiply the numerator when expanding fractions, 3) Not simplifying the final answer, 4) Making arithmetic errors when calculating the common denominator.

How do you check if your fraction addition answer is correct?

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Convert your fractions to decimals and add them to verify your answer matches the decimal equivalent of your fraction result. You can also work backwards by subtracting one original fraction from your answer to see if you get the other original fraction.

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