Math Problem Statement

What is the sum of 6 3/8 and 2 5/6 ?

Solution

To calculate the sum of 6386 \frac{3}{8} and 2562 \frac{5}{6}, we follow these steps:

Step 1: Convert the mixed numbers to improper fractions

  • 638=6×8+38=48+38=5186 \frac{3}{8} = \frac{6 \times 8 + 3}{8} = \frac{48 + 3}{8} = \frac{51}{8}
  • 256=2×6+56=12+56=1762 \frac{5}{6} = \frac{2 \times 6 + 5}{6} = \frac{12 + 5}{6} = \frac{17}{6}

Step 2: Find a common denominator

The denominators are 8 and 6. The least common denominator (LCD) of 8 and 6 is 24.

  • Convert 518\frac{51}{8} to a denominator of 24: 518=51×38×3=15324\frac{51}{8} = \frac{51 \times 3}{8 \times 3} = \frac{153}{24}

  • Convert 176\frac{17}{6} to a denominator of 24: 176=17×46×4=6824\frac{17}{6} = \frac{17 \times 4}{6 \times 4} = \frac{68}{24}

Step 3: Add the fractions

15324+6824=153+6824=22124\frac{153}{24} + \frac{68}{24} = \frac{153 + 68}{24} = \frac{221}{24}

Step 4: Convert back to a mixed number

  • Divide 221 by 24: 221÷24=9 remainder 5221 \div 24 = 9 \text{ remainder } 5 So, 22124=9524\frac{221}{24} = 9 \frac{5}{24}.

Final Answer:

The sum of 6386 \frac{3}{8} and 2562 \frac{5}{6} is: 95249 \frac{5}{24}

Would you like a detailed breakdown of any step?

Questions:

  1. What is the process for finding the least common denominator of two numbers?
  2. How do you convert mixed numbers to improper fractions?
  3. How can you simplify fractions after adding them?
  4. Why is it important to convert fractions to a common denominator before adding?
  5. Can you explain how to handle improper fractions when converting them back to mixed numbers?

Tip:

When working with mixed numbers, always verify your denominators carefully to avoid small calculation errors.

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Math Problem Analysis

Mathematical Concepts

Fractions
Mixed Numbers
Addition of Fractions
Least Common Denominator (LCD)

Formulas

Mixed number to improper fraction: a b/c = (a × c + b)/c
Finding the least common denominator (LCD)
Adding fractions: a/b + c/d = (ad + bc)/bd

Theorems

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Suitable Grade Level

Grades 5-7