Math Problem Statement

2/3×-5/7+7/3+2/3×-2/7

Solution

Let's break down and solve the expression step by step:

23×(57)+73+23×(27)\frac{2}{3} \times \left(-\frac{5}{7}\right) + \frac{7}{3} + \frac{2}{3} \times \left(-\frac{2}{7}\right)

Step 1: Multiply the fractions.

First, we'll perform the multiplications:

23×(57)=1021\frac{2}{3} \times \left(-\frac{5}{7}\right) = -\frac{10}{21} 23×(27)=421\frac{2}{3} \times \left(-\frac{2}{7}\right) = -\frac{4}{21}

Step 2: Rewrite the expression.

Now, rewrite the expression with the results from the multiplications:

1021+73421-\frac{10}{21} + \frac{7}{3} - \frac{4}{21}

Step 3: Find a common denominator.

The common denominator between 21 and 3 is 21. We'll rewrite 73\frac{7}{3} with a denominator of 21:

73=4921\frac{7}{3} = \frac{49}{21}

Now the expression becomes:

1021+4921421-\frac{10}{21} + \frac{49}{21} - \frac{4}{21}

Step 4: Combine the terms.

Since the denominators are the same, we can combine the numerators:

10+49421=3521\frac{-10 + 49 - 4}{21} = \frac{35}{21}

Step 5: Simplify the fraction.

3521\frac{35}{21} simplifies to:

53\frac{5}{3}

Final Answer:

The simplified value of the expression is:

53\frac{5}{3}

Would you like further details or explanations on any part of the solution?


Here are 5 related questions to further your understanding:

  1. How do you find a common denominator between two fractions?
  2. Can you explain how to simplify a fraction?
  3. What are the rules for multiplying fractions?
  4. How do you add and subtract fractions with different denominators?
  5. Can you provide another example of simplifying a complex fraction?

Tip: When working with fractions, always look for opportunities to simplify as early as possible to make calculations easier.

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Math Problem Analysis

Mathematical Concepts

Fractions
Multiplication of Fractions
Addition and Subtraction of Fractions
Simplification of Fractions

Formulas

a/b × c/d = (a×c)/(b×d)
Common Denominator: LCM of the denominators
Simplifying Fractions

Theorems

Fraction Multiplication
Adding and Subtracting Fractions

Suitable Grade Level

Grades 6-8