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Find the square root of 42.2542.25 using long division method.

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Q. Find the square root of 42.2542.25 using long division method.
  1. Set up problem: Set up the problem in long division format.\newlinePlace 42.2542.25 under a square root symbol, which is similar to a long division symbol. Group the digits in pairs, starting from the decimal point and moving to the left and to the right. For 42.2542.25, we have two pairs: 4242 and 2525.
  2. Find largest square number: Find the largest square number less than or equal to the first pair 4242. The largest square number less than or equal to 4242 is 3636 because 6×6=366 \times 6 = 36.
  3. Subtract square number: Subtract the square number 3636 from the first pair 4242 to get the remainder.4236=6.42 - 36 = 6. Bring down the next pair of digits 2525 next to the remainder to get 625625.
  4. Double and form new divisor: Double the divisor (66) and write it down with a blank digit on its right to form a new divisor.\newlineDoubling 66 gives us 1212, and we write it as 12_12\_ with a blank digit to find out.
  5. Determine largest digit: Determine the largest digit XX that fits in the blank of 12X12X such that 12X×X62512X \times X \leq 625.\newlineThe largest value for XX that satisfies 12X×X62512X \times X \leq 625 is 55 because 125×5=625125 \times 5 = 625.
  6. Subtract product from remainder: Subtract the product of the new divisor and the new digit from the remainder.\newline625(125×5)=625625=0625 - (125 \times 5) = 625 - 625 = 0. There is no remainder.
  7. Write down result: Write down the result.\newlineThe result of the square root of 42.2542.25 is the combination of the digits found in Steps 22 and 55, which are 66 and 55 respectively.

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