Mixed Numbers Addition and Subtraction Practice Problems

Master adding and subtracting mixed numbers with step-by-step practice problems. Learn to convert mixed numbers to improper fractions and find common denominators.

πŸ“šReady to Practice Adding and Subtracting Mixed Numbers?
  • Convert mixed numbers to improper fractions using multiplication method
  • Find common denominators by multiplying denominators together
  • Add and subtract numerators while keeping denominators the same
  • Solve real-world problems involving mixed number operations
  • Simplify final answers to lowest terms
  • Master the 3-step process for mixed number calculations

Understanding Addition and Subtraction of Mixed Numbers

Complete explanation with examples

To add and subtract mixed numbers, we will proceed in 3 steps.

The first step:

We will convert the mixed numbers into equivalent fractions - fractions with numerator and denominator without whole numbers.

The second step:

Find a common denominator (usually by multiplying the denominators).

The third step:

We will only add or subtract the numerators. The denominator will be written once in the final result.

Detailed explanation

Practice Addition and Subtraction of Mixed Numbers

Test your knowledge with 16 quizzes

\( 2+3\frac{3}{7}= \)

Examples with solutions for Addition and Subtraction of Mixed Numbers

Step-by-step solutions included
Exercise #1

525+215= 5\frac{2}{5}+2\frac{1}{5}=

Step-by-Step Solution

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

  • Step 1: Add the whole number parts.
  • Step 2: Add the fractional parts.
  • Step 3: Combine results and simplify if necessary.

Now, let's work through each step:
Step 1: The mixed numbers are 5255\frac{2}{5} and 2152\frac{1}{5}. First, add the whole number parts: 5+2=75 + 2 = 7.
Step 2: Next, add the fractional parts: 25+15=35\frac{2}{5} + \frac{1}{5} = \frac{3}{5}. Since the denominators are the same, just add the numerators.
Step 3: Combine these sums to form the mixed number: 7+35=7357 + \frac{3}{5} = 7\frac{3}{5}.

Therefore, the solution to the problem is 735 7\frac{3}{5} .

Answer:

735 7\frac{3}{5}

Video Solution
Exercise #2

1012βˆ’12= 10\frac{1}{2}-\frac{1}{2}=

Step-by-Step Solution

Let's solve the problem step-by-step:

  • Step 1: Identify the parts of the mixed number 1012 10\frac{1}{2} . It consists of the whole number 10 10 and the fraction 12 \frac{1}{2} .

  • Step 2: We'll subtract 12 \frac{1}{2} (the fraction we are given to subtract) from the fraction part of the mixed number:

12βˆ’12=0 \frac{1}{2} - \frac{1}{2} = 0

Step 3: After performing the subtraction, the fractional part becomes 0 0 .

Step 4: This leaves us with the whole part of the mixed number on its own, which is 10 10 .

Therefore, the solution to the problem is 10 10 .

Answer:

10 10

Video Solution
Exercise #3

626+126= 6\frac{2}{6}+1\frac{2}{6}=

Step-by-Step Solution

To solve this problem, we will add the mixed numbers 626 6\frac{2}{6} and 126 1\frac{2}{6} by following these steps:

  • Step 1: Add the integer parts: 6+1=7 6 + 1 = 7 .
  • Step 2: Add the fractional parts: 26+26=46\frac{2}{6} + \frac{2}{6} = \frac{4}{6}.
  • Step 3: Combine the results to express the sum: 7+46 7 + \frac{4}{6} .

Now, let's work through each step:
Step 1: Adding the whole numbers, we get 7 7 .
Step 2: Since both fractions have a common denominator of 6, we add the numerators: 2+2=4 2 + 2 = 4 , thus giving us the fraction 46\frac{4}{6}.
Step 3: The combined sum of the whole number and the fraction is 746 7\frac{4}{6} .

Hence, the solution to the problem is 746 7\frac{4}{6} .

Answer:

746 7\frac{4}{6}

Video Solution
Exercise #4

225+225= 2\frac{2}{5}+2\frac{2}{5}=

Step-by-Step Solution

To solve the problem 225+225 2\frac{2}{5} + 2\frac{2}{5} , follow these steps:

  • Step 1: Add the whole numbers together. We have 2+2=42 + 2 = 4.
  • Step 2: Add the fractional parts together. Since both fractions have the same denominator, simply add the numerators: 25+25=45\frac{2}{5} + \frac{2}{5} = \frac{4}{5}.
  • Step 3: Combine the results from Step 1 and Step 2. The sum of the whole numbers and fraction parts is 4+45=4454 + \frac{4}{5} = 4\frac{4}{5}.

Thus, the sum of 225 2\frac{2}{5} and 225 2\frac{2}{5} is 445\mathbf{4\frac{4}{5}}.

The answer corresponds to choice 4.

Answer:

445 4\frac{4}{5}

Video Solution
Exercise #5

213βˆ’123= 2\frac{1}{3}-1\frac{2}{3}=

Step-by-Step Solution

To solve the problem 213βˆ’1232\frac{1}{3} - 1\frac{2}{3}, we'll perform the following steps:

  • Step 1: Subtract the integer parts: 2βˆ’1=12 - 1 = 1.
  • Step 2: Subtract the fractional parts: 13βˆ’23\frac{1}{3} - \frac{2}{3}.

To calculate 13βˆ’23\frac{1}{3} - \frac{2}{3}:

Since the fractions have a common denominator, subtract only the numerators:
1βˆ’2=βˆ’11 - 2 = -1.
Therefore, 13βˆ’23=βˆ’13\frac{1}{3} - \frac{2}{3} = -\frac{1}{3}.

Now combine the results:

The subtraction results in 1βˆ’131 - \frac{1}{3}.

To simplify, note 1=331 = \frac{3}{3}.

Thus, 1βˆ’13=33βˆ’13=231 - \frac{1}{3} = \frac{3}{3} - \frac{1}{3} = \frac{2}{3}.

Therefore, the solution to 213βˆ’1232\frac{1}{3} - 1\frac{2}{3} is 23\frac{2}{3}.

Answer:

23 \frac{2}{3}

Video Solution

Frequently Asked Questions

How do you add mixed numbers step by step?

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To add mixed numbers, follow these 3 steps: 1) Convert each mixed number to an improper fraction by multiplying the whole number by the denominator and adding the numerator. 2) Find a common denominator by multiplying the denominators together. 3) Add only the numerators and keep the common denominator.

What is the easiest way to convert a mixed number to an improper fraction?

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Multiply the whole number by the denominator, then add the numerator to get the new numerator. The denominator stays the same. For example: 3⁴⁄₅ becomes (3Γ—5+4)/5 = 19/5.

Do you need a common denominator to subtract mixed numbers?

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Yes, you need a common denominator to subtract mixed numbers. First convert to improper fractions, then find a common denominator (usually by multiplying the denominators), and finally subtract the numerators.

What are common mistakes when adding mixed numbers?

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Common mistakes include: β€’ Adding whole numbers and fractions separately instead of converting to improper fractions first β€’ Forgetting to find a common denominator β€’ Adding denominators instead of keeping them the same β€’ Not simplifying the final answer

How do you find a common denominator for mixed numbers?

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After converting mixed numbers to improper fractions, multiply each fraction by the denominator of the other fraction. For example, with ³⁄₄ and ²⁄₅, multiply the first by 5 and the second by 4 to get ¹⁡⁄₂₀ and ⁸⁄₂₀.

Can you add mixed numbers without converting to improper fractions?

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While it's possible to add whole numbers and fractions separately, converting to improper fractions first is the most reliable method. This ensures accuracy and works for all cases, especially when borrowing is needed in subtraction.

What grade level learns mixed number addition and subtraction?

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Mixed number addition and subtraction is typically taught in 4th and 5th grade mathematics. Students learn this after mastering basic fraction operations and understanding equivalent fractions.

Why do we only add the numerators when adding fractions?

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We only add numerators because the denominator tells us the size of each piece, and we're counting how many pieces we have total. Adding denominators would change the size of the pieces, which is mathematically incorrect.

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