square root of 786 by long division method
Answers
Answer:
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Step-by-step explanation:
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Answer:
The square root of 786 with one digit decimal accuracy is 28.0.
Step-by-step explanation:
Step 1)
Set up 786 in pairs of two digits from right to left and attach one set of 00 because we want one decimal:
7 86 00
Step 2)
Starting with the first set: the largest perfect square less than or equal to 7 is 4, and the square root of 4 is 2. Therefore, put 2 on top and 4 at the bottom like this:
2
7 86 00
4
Step 3)
Calculate 7 minus 4 and put the difference below. Then move down the next set of numbers.
2
7 86 00
4
3 86
Step 4)
Double the number in green on top: 2 × 2 = 4. Then, use 4 and the bottom number to make this problem:
4? × ? ≤ 386
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 8. Replace the question marks in the problem with 8 to get:
48 × 8 = 384.
Now, enter 8 on top, and 384 at the bottom:
2 8
7 86 00
4
3 86
3 84
Step 5)
Calculate 386 minus 384 and put the difference below. Then move down the next set of numbers.
2 8
7 86 00
4
3 86
3 84
0 02 00
Step 6)
Double the number in green on top: 28 × 2 = 56. Then, use 56 and the bottom number to make this problem:
56? × ? ≤ 200
The question marks are "blank" and the same "blank". With trial and error, we found the largest number "blank" can be is 0. Now, enter 0 on top:
2 8 0
7 86 00
4
3 86
3 84
0 02 00
That's it! The answer is on top. The square root of 786 with one digit decimal accuracy is 28.0. Did you notice that the last two steps repeat the previous two steps. You can add decimals by simply adding more sets of 00 and repeating the last two steps over and over.