Question

Estimate the product of 1252 x 61​

Answer 1

To Find :- Estimate the product of 1252 x 61 ?

Solution :-

→ 1252 × 61

Rounding off both numbers by general rule we get,

→ 1252

→ Ten's place digit = 5

So, hundreds place digit will increase by 1 .

then,

→ 1252 rounds off to = 1300

and,

→ 61

→ Unit's place digit = 6

So, Ten's place digit remains same and unit place digit becomes zero .

then,

→ 61 rounds off to = 60

then,

→ Required product = 1300 × 60 = 78000 (Ans.)

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Answer 2

Given :  product of 1252 x 61​

To Find : Estimate the product

Solution:

1252 x 61​

Rounding to 10

1252 Rounded off  to  1250

61 rounded off to  60

1250 * 60

= 125 * 6 * 100

= 750 * 100

= 75000

Estimate of the product of 1252 x 61​  is 75000

Actual product is 76372  ,   so Estimate is Quite close.

Rounding to 100

1252  is rounded off to 1300

61 is rounded off to 100

1300 * 100 = 1300000   not a good estimate

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