Solve Mixed Number Addition: 2⅙ + 2⅔ Step-by-Step

Mixed Number Addition with Common Denominators

216+223= 2\frac{1}{6}+2\frac{2}{3}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:05 First convert mixed fractions to fractions
00:45 Multiply to find the common denominator
00:55 Add using the common denominator
01:07 Now convert to a mixed fraction
01:14 Break down 29 into 24 plus 5
01:20 Break down the fraction into whole number and remainder
01:26 Convert proper fraction to whole number and combine with mixed fraction
01:32 And this is the solution to the problem

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

216+223= 2\frac{1}{6}+2\frac{2}{3}=

2

Step-by-step solution

To find the sum of 216+223 2\frac{1}{6} + 2\frac{2}{3} , we will follow these steps:

  • Step 1: Separate the mixed numbers into their whole and fractional parts:
    • Whole parts: 22 and 22.
    • Fractional parts: 16 \frac{1}{6} and 23 \frac{2}{3} .
  • Step 2: Add the whole parts:
    • 2+2=42 + 2 = 4.
  • Step 3: Convert fractional parts using a common denominator:
    • The fractions are 16 \frac{1}{6} and 23 \frac{2}{3} .
    • The least common denominator of 66 and 33 is 66.
    • 23\frac{2}{3} is converted to 46\frac{4}{6} by multiplying both numerator and denominator by 22.
  • Step 4: Add the fractions:
    • 16+46=56 \frac{1}{6} + \frac{4}{6} = \frac{5}{6} .
  • Step 5: Combine results:
    • Combine the whole and fractional parts: 4+56=4564 + \frac{5}{6} = 4\frac{5}{6}.

Therefore, the sum of the mixed numbers 216 2\frac{1}{6} and 223 2\frac{2}{3} is 456 4\frac{5}{6} .

3

Final Answer

456 4\frac{5}{6}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Add whole parts separately, then add fractional parts with same denominator
  • Technique: Convert 23 \frac{2}{3} to 46 \frac{4}{6} for common denominator 6
  • Check: Verify 456=216+223 4\frac{5}{6} = 2\frac{1}{6} + 2\frac{2}{3} by converting back ✓

Common Mistakes

Avoid these frequent errors
  • Adding denominators together
    Don't add denominators like 16+23=39 \frac{1}{6} + \frac{2}{3} = \frac{3}{9} ! This creates a completely wrong fraction. Always find the LCD first, convert fractions to equivalent forms with the same denominator, then add only the numerators.

Practice Quiz

Test your knowledge with interactive questions

\( 5:\frac{2}{5}= \)

FAQ

Everything you need to know about this question

Why can't I just add the fractions 16+23 \frac{1}{6} + \frac{2}{3} directly?

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You need a common denominator to add fractions! Think of it like adding different units - you can't add 1 sixth plus 2 thirds without converting them to the same unit first.

How do I find the least common denominator of 6 and 3?

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List multiples of each number: 6 (6, 12, 18...) and 3 (3, 6, 9, 12...). The smallest number that appears in both lists is 6, so LCD = 6.

What if my fractional part adds up to more than 1?

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If you get something like 76 \frac{7}{6} , convert it! 76=116 \frac{7}{6} = 1\frac{1}{6} , so add that extra 1 to your whole number part.

Can I convert mixed numbers to improper fractions instead?

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Absolutely! Convert 216=136 2\frac{1}{6} = \frac{13}{6} and 223=83=166 2\frac{2}{3} = \frac{8}{3} = \frac{16}{6} , then add: 136+166=296=456 \frac{13}{6} + \frac{16}{6} = \frac{29}{6} = 4\frac{5}{6} .

Why do I keep getting the wrong answer?

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Check these common steps: Are you finding the correct LCD? Are you converting fractions properly? Are you adding numerators correctly? Double-check each step carefully!

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