Solve the Fraction Addition: 1/5 + 6/10 Step-by-Step

Fraction Addition with Different Denominators

Solve the following exercise:

15+610=? \frac{1}{5}+\frac{6}{10}=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 We want to find the least common denominator
00:06 So we'll multiply by 2 for the common denominator 10
00:09 Remember to multiply both numerator and denominator
00:15 Let's calculate the multiplications
00:21 Add under common denominator
00:27 Calculate the numerator
00:30 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:

15+610=? \frac{1}{5}+\frac{6}{10}=\text{?}

2

Step-by-step solution

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

  • Step 1: Identify the given fractions and their denominators.
  • Step 2: Determine a common denominator.
  • Step 3: Convert each fraction to have the common denominator.
  • Step 4: Add the fractions' numerators together.
  • Step 5: Verify the answer against the possible choices.

Now, let's work through each step:

Step 1: The given fractions are 15 \frac{1}{5} and 610 \frac{6}{10} .

Step 2: The common denominator for these fractions is 10, as it is already the denominator of the second fraction.

Step 3: Convert 15 \frac{1}{5} to a fraction with a denominator of 10 by multiplying both the numerator and the denominator by 2:
15=1×25×2=210 \frac{1}{5} = \frac{1 \times 2}{5 \times 2} = \frac{2}{10} .

Step 4: Add the fractions with the common denominator:
210+610=2+610=810 \frac{2}{10} + \frac{6}{10} = \frac{2 + 6}{10} = \frac{8}{10} .

Step 5: Compare the result 810 \frac{8}{10} with the possible choices given. The correct choice is 810\frac{8}{10}, which matches choice id="2".

Therefore, the solution to the problem is 810 \frac{8}{10} .

3

Final Answer

810 \frac{8}{10}

Key Points to Remember

Essential concepts to master this topic
  • Common Denominator Rule: Convert fractions to same denominator before adding
  • Technique: Convert 15 \frac{1}{5} to 210 \frac{2}{10} by multiplying by 2/2
  • Check: Add numerators with same denominator: 2 + 6 = 8 over 10 ✓

Common Mistakes

Avoid these frequent errors
  • Adding numerators and denominators separately
    Don't add 1 + 6 = 7 and 5 + 10 = 15 to get 7/15! This ignores the rule that fractions need the same denominator. Always find a common denominator first, then add only the numerators.

Practice Quiz

Test your knowledge with interactive questions

\( \frac{2}{4}+\frac{1}{4}= \)\( \)

FAQ

Everything you need to know about this question

Why can't I just add 1/5 + 6/10 directly?

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You can only add fractions when they have the same denominator. Think of it like adding different units - you can't add 1 apple + 6 oranges directly. You need to convert to a common "unit" first!

How do I find the common denominator?

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Look for the least common multiple (LCM) of the denominators. Since 10 is already a multiple of 5, we can use 10 as our common denominator. Convert 15 \frac{1}{5} to tenths!

Do I need to simplify 8/10?

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It's good practice to simplify fractions when possible! 810=45 \frac{8}{10} = \frac{4}{5} when you divide both parts by 2. However, the answer choices show 810 \frac{8}{10} , so that's acceptable here.

What if the denominators were different, like 3 and 7?

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When denominators have no common factors, multiply them together. For 3 and 7, the common denominator would be 21. Convert both fractions to twenty-firsts before adding!

Can I convert 6/10 to fifths instead?

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Absolutely! 610=35 \frac{6}{10} = \frac{3}{5} , so you could solve 15+35=45 \frac{1}{5} + \frac{3}{5} = \frac{4}{5} . Both methods work - choose whichever feels easier!

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