Math Problem Statement

Find the square root 59684 using long division method

Solution

To find the square root of 5968459684 using the long division method, follow these steps:


Step 1: Pair the digits from right to left

Divide the number 5968459684 into pairs of two digits starting from the right. Add extra 0s if needed.

5968459 \, | \, 68 \, | \, 4


Step 2: Find the largest number whose square is less than or equal to the leftmost pair

The leftmost pair is 5959.

  • The largest number whose square is less than or equal to 5959 is 77, because: 72=49and82=64(>59)7^2 = 49 \quad \text{and} \quad 8^2 = 64 \, (> 59)

Write 77 as the first digit of the quotient. Subtract 4949 from 5959:

5949=1059 - 49 = 10

Bring down the next pair 6868, so the new dividend becomes 10681068.


Step 3: Double the quotient and determine the next digit

Double the current quotient 77: 2×7=142 \times 7 = 14

Now, find a digit xx such that: 14xx106814x \cdot x \leq 1068

  • If x=7x = 7, 1477=1029147 \cdot 7 = 1029, which is less than 10681068.
  • If x=8x = 8, 1488=1184148 \cdot 8 = 1184, which exceeds 10681068.

Thus, x=7x = 7. Add 77 to the quotient and subtract 10291029 from 10681068:

10681029=391068 - 1029 = 39

Bring down the next pair 0404, so the new dividend becomes 39043904.


Step 4: Repeat the process

Double the current quotient 7777: 2×77=1542 \times 77 = 154

Now, find a digit xx such that: 154xx3904154x \cdot x \leq 3904

  • If x=2x = 2, 15422=30841542 \cdot 2 = 3084, which is less than 39043904.
  • If x=3x = 3, 15433=46291543 \cdot 3 = 4629, which exceeds 39043904.

Thus, x=2x = 2. Add 22 to the quotient and subtract 30843084 from 39043904:

39043084=8203904 - 3084 = 820


Step 5: Continue for more accuracy (optional)

Bring down two zeros (0000) to get 8200082000. Repeat the process if further decimal places are needed.


Result

The square root of 5968459684 using the long division method is approximately:

244\boxed{244}

Would you like a detailed explanation of any step, or do you have any specific questions?


Related Questions

  1. What is the long division method for cube roots?
  2. How can you verify a square root calculation?
  3. What are alternative methods to find square roots of large numbers?
  4. How is the long division method related to the decimal expansion of roots?
  5. Can square roots be estimated using mental math?

Tip

Always double-check each step in the long division process to avoid errors, especially when selecting the digits for the quotient.

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Math Problem Analysis

Mathematical Concepts

Square Roots
Long Division Method
Estimation

Formulas

No specific formulas used, but involves the long division method for square roots.

Theorems

The process of finding square roots using long division.

Suitable Grade Level

Grades 7-9