Question

Q3) Estimate the following by using general rule
(1)
428 x 98
2-7,835 – 3,498
3-8,263 - 435​

Answer 1

Answer:

578 x 161

Rounding off 578 to the nearest hundreds, we get 600

And, rounding off 161 to the nearest hundreds, we get 200

Therefore, 600 x 200 = 1,20,000

It means that estimate of 578 x 161 is equal to 1,20,000 according to the general rule.

Solution (b)

5281 × 3491

Rounding off 5,291 to the nearest thousands, we get 5,000

And, rounding off 3,491 to the nearest hundreds, we get 3,500

Therefore, 5,000 x 3,500 = 1,75,00,000

It means that estimate of 5281 x 3491 is equal to 1,75,00,000 according to the general rule.

Solution (c)

1291 × 592

Rounding off 1291 to the nearest hundreds we get, 1300

And, rounding off 592 to the nearest hundreds, we get 600

Therefore, 1300 x 600 = 7,80,000

It means that estimate of 1291 x 592 is equal to 7,80,000 according to the general rule.

Solution (d)

9250 × 29

Rounding off 9250 to the nearest thousands, we get 9000

And, rounding off 29 to the nearest tens, we get 30

Therefore, 9000 x 30 = 2,70,000

It means that estimate of 9250 × 29 is equal to 2,70,000 using general rule.

Filed Under: NCERT Solutions

Tagged With: class 6th, knowing our numbers, ncert solutions

Comments

SHANOJ A JOY says

July 1, 2016 at 01:27

5281 × 3491

can i do this

5300 X 3500 or

5300 x 3000 or

5000 x 3000

Reply

Sumedha says

April 9, 2018 at 01:27

As we were told that the general rule is to round off the number to its greatest place... According to that

5281 x 3491

5000 x 3000

=15000000

Similarly

1291 x 592

1000 x 600

=600000

Reply

Rajesh says

April 18, 2018 at 01:27

अगर हम 5281 का नजदीकी 5000 मानते हैं तो 3481 का 3000 क्यों नहीं

Reply

Gaurav says

April 25, 2018 at 01:27

Same question I also want answer of this question ..Why ???

Reply