Solve: (5/6 × 1/2) - (1/2 × 2/6) Mixed Fraction Operations

Fraction Multiplication with Subtraction Operations

Solve the following exercise:

56121226=? \frac{5}{6}\cdot\frac{1}{2}-\frac{1}{2}\cdot\frac{2}{6}=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Always solve multiplication and division before addition and subtraction
00:06 Make sure to multiply numerator by numerator and denominator by denominator
00:11 Calculate the multiplications
00:20 Subtract by the common denominator
00:24 Calculate the numerator
00:30 Break down the factor 12 into factors 3 and 4
00:34 Reduce what's possible
00:38 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

56121226=? \frac{5}{6}\cdot\frac{1}{2}-\frac{1}{2}\cdot\frac{2}{6}=\text{?}

2

Step-by-step solution

To solve the problem, we need to evaluate the expression

56121226 \frac{5}{6} \cdot \frac{1}{2} - \frac{1}{2} \cdot \frac{2}{6} .

Let's go through this step-by-step:

  • Step 1:
    Calculate the first multiplication:
    5612=5162=512 \frac{5}{6} \cdot \frac{1}{2} = \frac{5 \cdot 1}{6 \cdot 2} = \frac{5}{12}
  • Step 2:
    Calculate the second multiplication:
    1226=1226=212 \frac{1}{2} \cdot \frac{2}{6} = \frac{1 \cdot 2}{2 \cdot 6} = \frac{2}{12} Simplify 212\frac{2}{12} by dividing the numerator and the denominator by their greatest common divisor, 2:
    212=16 \frac{2}{12} = \frac{1}{6}
  • Step 3:
    Subtract the second result from the first:
    Since we have 51216\frac{5}{12} - \frac{1}{6}, find a common denominator for the fractions, which is 12. Convert 16\frac{1}{6} to a denominator of 12:
    16=212 \frac{1}{6} = \frac{2}{12} Now, perform the subtraction:
    512212=312 \frac{5}{12} - \frac{2}{12} = \frac{3}{12} Simplify 312\frac{3}{12} by dividing the numerator and denominator by their greatest common divisor, 3:
    312=14 \frac{3}{12} = \frac{1}{4}

Therefore, the solution to the problem is 14 \frac{1}{4} .

3

Final Answer

14 \frac{1}{4}

Key Points to Remember

Essential concepts to master this topic
  • Order: Multiply fractions first, then subtract the results
  • Technique: Find common denominator: 512212=312 \frac{5}{12} - \frac{2}{12} = \frac{3}{12}
  • Check: Simplify final answer by dividing by GCD: 312=14 \frac{3}{12} = \frac{1}{4}

Common Mistakes

Avoid these frequent errors
  • Subtracting before finding common denominators
    Don't subtract 51216 \frac{5}{12} - \frac{1}{6} directly = wrong answer! Different denominators can't be subtracted without conversion. Always convert to common denominators first: 16=212 \frac{1}{6} = \frac{2}{12} , then subtract.

Practice Quiz

Test your knowledge with interactive questions

Complete the following exercise:

\( \frac{1}{2}:\frac{3}{5}=\text{?} \)

FAQ

Everything you need to know about this question

Do I multiply first or subtract first?

+

Always follow the order of operations! Multiplication comes before subtraction, so calculate 5612 \frac{5}{6} \cdot \frac{1}{2} and 1226 \frac{1}{2} \cdot \frac{2}{6} first, then subtract the results.

Why do I need a common denominator for subtraction?

+

You can only subtract fractions with the same denominator! Think of it like subtracting apples - you can't take away oranges from apples. Convert 16 \frac{1}{6} to 212 \frac{2}{12} so both fractions have denominator 12.

How do I multiply fractions quickly?

+

Multiply straight across: numerator × numerator and denominator × denominator. So 5612=5×16×2=512 \frac{5}{6} \cdot \frac{1}{2} = \frac{5 \times 1}{6 \times 2} = \frac{5}{12} .

Should I simplify after each step?

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You can simplify at each step, but it's often easier to simplify only at the end. Just make sure your final answer is in lowest terms by dividing by the GCD.

What if I get a different common denominator?

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Any common denominator works! While 12 is the least common denominator for 12 and 6, you could use 24 or 36 too. You'll get the same final answer after simplifying.

How do I check my answer?

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Substitute your result back into the original expression. Calculate each part separately and verify: 512212=312=14 \frac{5}{12} - \frac{2}{12} = \frac{3}{12} = \frac{1}{4}

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