Question

Estimate the result by rounding the numbers to the second decimal before performing the operation. Then also round your answer to the second decimal. 8123÷0.211 How do you do it?

Answer 1

40615

Explanation:

Note, rounding off decimals involves observing if the said decimal is up to the value of 5. If it is, then it can be rounded up, if not, its rounded off.

Since we need to round the numbers to the second decimal before performing the operation, we will have, 8123÷0.2

Note, 8123 has no decimal so we ignore

But 0.211 has a second decimal which is the first 1 so because it's not up to 5, we round it off to 0.

Hence we have 8123 ÷ 0.2= 40615.0

Since our answer has no decimal, we leave it like that.

Answer 2

38680.95

Explanation:

Solution:-

- We will round the denominator of the fraction " 0.211 " to two decimal places.

0 . 2 1 1

1st 2nd 3rd

3rd digit = 1 < 5 ... "Truncate the 3rd decimal value and on wards"

ans: 0.21

- Now perform the division:

8123 / 0.21 = 38680.95238

- Now again round the resulting answer to 2nd decimal place:

38680. 9 5 2

1st 2nd 3rd

3rd digit = 2 < 5 ... "Truncate the 3rd decimal value and on wards"

- The resulting answer will be after rounding to 2nd decimal place:

Answer: 38680.95