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Question

Simplify: $\frac{(120 - 12) \div (24 \div 2) - 12 + 7}{5 \times 12 \div 10 - (6 \times 4) \div 12}$

The correct answer is
1

Simplify Fraction Calculation

The problem requires simplifying the following expression using the order of operations (PEMDAS/BODMAS):

$ \frac{(120 - 12) \div (24 \div 2) - 12 + 7}{5 \times 12 \div 10 - (6 \times 4) \div 12} $

Numerator Calculation

First, simplify the numerator: $(120 - 12) \div (24 \div 2) - 12 + 7$.

  1. Calculate expressions within parentheses:
    • $120 - 12 = 108$
    • $24 \div 2 = 12$
  2. Substitute the results back into the numerator expression: $108 \div 12 - 12 + 7$.
  3. Perform the division: $108 \div 12 = 9$.
  4. The expression becomes: $9 - 12 + 7$.
  5. Perform subtraction and addition from left to right:
    • $9 - 12 = -3$
    • $-3 + 7 = 4$

The simplified numerator is 4.

Denominator Calculation

Next, simplify the denominator: $5 \times 12 \div 10 - (6 \times 4) \div 12$.

  1. Calculate expressions within parentheses:
    • $6 \times 4 = 24$
  2. Perform multiplications and divisions from left to right:
    • $5 \times 12 = 60$
    • $60 \div 10 = 6$
    • $24 \div 12 = 2$
  3. Substitute the results back into the denominator expression: $6 - 2$.
  4. Perform the subtraction: $6 - 2 = 4$.

The simplified denominator is 4.

Final Simplification

Combine the simplified numerator and denominator:

$ \frac{\text{Numerator}}{\text{Denominator}} = \frac{4}{4} $

Perform the final division:

$ \frac{4}{4} = 1 $

The simplified value of the expression is 1.

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Important Questions from Simplification (Notes)

  1. Evaluate: (-9) - (-56) ÷ (-14) + (-4) × 7
  2. $\frac{\sqrt[3]{6859}}{\sqrt[4]{256}} \times \frac{2}{57} \times 168 = ?$
  3. In the Delhi zoo, there are some ducks and rabbits. If the heads are counted there are 160, while the legs are 450. What will be number of ducks in the zoo ?
  4. Identify the number that will replace the question mark in the second equation based on the relationship represented in the first equation.

     

  5. Simplify: $\frac{\sqrt{16x^4 - 72x^2y^2 + 81y^4}}{\sqrt{4x^2 - 12xy + 9y^2}} - (2x - 3y)$, given that $2x > 3y$.

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