WHAT IS THE SQUARE OF 438? WHO WILL ANSWER FIRST I WILL MARK AS BRAINLIST ANSWER
Answers
Answer:
20.9
Step-by-step explanation:
to calculate the square root of 438 using the long division method with one decimal place accuracy. This is the lost art of how they calculated the square root of 438 by hand before modern technology was invented.
Step 1)
Set up 438 in pairs of two digits from right to left and attach one set of 00 because we want one decimal:
4 38 00
Step 2)
Starting with the first set: the largest perfect square less than or equal to 4 is 4, and the square root of 4 is 2. Therefore, put 2 on top and 4 at the bottom like this:
2
4 38 00
4
Step 3)
Calculate 4 minus 4 and put the difference below. Then move down the next set of numbers.
2
4 38 00
4
0 38
Step 4)
Double the number in green on top: 2 × 2 = 4. Then, use 4 and the bottom number to make this problem:
4? × ? ≤ 38
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 0. Replace the question marks in the problem with 0 to get:
40 × 0 = 0.
Now, enter 0 on top, and 0 at the bottom:
2 0
4 38 00
4
0 38
0 00
Step 5)
Calculate 38 minus 0 and put the difference below. Then move down the next set of numbers.
2 0
4 38 00
4
0 38
0 00
0 38 00
Step 6)
Double the number in green on top: 20 × 2 = 40. Then, use 40 and the bottom number to make this problem:
40? × ? ≤ 3800
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 9. Now, enter 9 on top:
2 0 9
4 38 00
4
0 38
0 00
0 38 00
That's it! The answer is on top. The square root of 438 with one digit decimal accuracy is 20.9.
Answer:
simple its 20.9
Step-by-step explanation:
and if you want to write in blank write decimal that's it now mark me