Math Problem Statement

 Perform the operations: 1 1/5  x 1 3/5 + 7 1/5 ÷  4 4/5 Show solution.

a. 3 9/50

b. 3 21/50

c. 2 9/50

d. 2 8/50

Solution

To solve the given problem 115×135+715÷4451 \frac{1}{5} \times 1 \frac{3}{5} + 7 \frac{1}{5} \div 4 \frac{4}{5}, we will follow the order of operations: multiplication and division first, then addition.


Step 1: Convert all mixed numbers to improper fractions

  1. 115=651 \frac{1}{5} = \frac{6}{5}
  2. 135=851 \frac{3}{5} = \frac{8}{5}
  3. 715=3657 \frac{1}{5} = \frac{36}{5}
  4. 445=2454 \frac{4}{5} = \frac{24}{5}

Step 2: Perform the operations

Multiplication: 115×1351 \frac{1}{5} \times 1 \frac{3}{5}

65×85=4825\frac{6}{5} \times \frac{8}{5} = \frac{48}{25}

Division: 715÷4457 \frac{1}{5} \div 4 \frac{4}{5}

365÷245=365×524=365524=3624=32\frac{36}{5} \div \frac{24}{5} = \frac{36}{5} \times \frac{5}{24} = \frac{36 \cdot 5}{5 \cdot 24} = \frac{36}{24} = \frac{3}{2}


Step 3: Add the results

Convert 32\frac{3}{2} to a fraction with denominator 25 for addition: 32=37.525=75502150\frac{3}{2} = \frac{37.5}{25} = \frac{75}{50} \approx \frac{21}{50}

Step 1: Simplify individual parts

Mixed fraction conversions:

1

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Math Problem Analysis

Mathematical Concepts

Mixed Numbers
Improper Fractions
Order of Operations
Multiplication
Division
Fraction Addition

Formulas

Multiplying Fractions
Dividing Fractions
Converting Mixed Numbers to Improper Fractions
Fraction Addition

Theorems

Order of Operations (PEMDAS)

Suitable Grade Level

Grades 4-6