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5.7bar(32) + 8.bar(613)...

`5.7bar(32) + 8.bar(613)`

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To solve the problem \( 5.7\overline{32} + 8.\overline{613} \), we need to first convert the repeating decimals into fractions and then perform the addition. ### Step 1: Convert \( 5.7\overline{32} \) into a fraction Let \( x = 5.7\overline{32} \). To eliminate the repeating part, we can express it as follows: 1. Multiply \( x \) by \( 1000 \) (to shift the decimal point three places to the right): \[ 1000x = 5732.\overline{32} \] 2. Multiply \( x \) by \( 10 \) (to shift the decimal point one place to the right): \[ 10x = 57.\overline{32} \] 3. Now, subtract the second equation from the first: \[ 1000x - 10x = 5732.\overline{32} - 57.\overline{32} \] \[ 990x = 5732 - 57 \] \[ 990x = 5675 \] \[ x = \frac{5675}{990} \] 4. Simplify \( \frac{5675}{990} \): - The GCD of 5675 and 990 is 5. \[ x = \frac{5675 \div 5}{990 \div 5} = \frac{1135}{198} \] ### Step 2: Convert \( 8.\overline{613} \) into a fraction Let \( y = 8.\overline{613} \). 1. Multiply \( y \) by \( 1000 \): \[ 1000y = 8613.\overline{613} \] 2. Multiply \( y \) by \( 10 \): \[ 10y = 86.\overline{613} \] 3. Subtract the second equation from the first: \[ 1000y - 10y = 8613.\overline{613} - 86.\overline{613} \] \[ 990y = 8613 - 86 \] \[ 990y = 8527 \] \[ y = \frac{8527}{990} \] ### Step 3: Add the two fractions Now we have: \[ x = \frac{1135}{198}, \quad y = \frac{8527}{990} \] To add \( x \) and \( y \), we need a common denominator. The least common multiple (LCM) of 198 and 990 is 990. 1. Convert \( x \) to have a denominator of 990: \[ x = \frac{1135 \times 5}{198 \times 5} = \frac{5675}{990} \] 2. Now add \( x \) and \( y \): \[ x + y = \frac{5675}{990} + \frac{8527}{990} = \frac{5675 + 8527}{990} = \frac{14202}{990} \] 3. Simplify \( \frac{14202}{990} \): - The GCD of 14202 and 990 is 6. \[ \frac{14202 \div 6}{990 \div 6} = \frac{2367}{165} \] ### Final Answer Thus, the final result of \( 5.7\overline{32} + 8.\overline{613} \) is: \[ \frac{2367}{165} \]
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ARIHANT SSC-FUNDAMENTALS -TEST OF YOU - LEARNING - 2
  1. 5.7bar(32) + 8.bar(613)

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