Question

Estimate the product
a.8021 multiply 315
b.7423 multiply 707
c.45337 multiply 279
d. 21097 multiply 591​

Answer 1

Answer:

In 475 the last two digits i.e., 75 is greater than 50.

Therefore, 1 will be added to the 3rd last digit and the last two digits will become zero.

After rounding to nearest hundred we will get 500.

In 225 the last two digit i.e., 25 is less than 50

Thus, the 3rd last will remain same and the last digit will become zero.

After rounding to nearest ten we will get 200.

Hence, the required product is 500×200=1,00,000

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Answer 2

Answer:

$a) \: 8021 \times 315$

$2526615$

Ans. 2526615

$b) \: 7423 \times 707$

$5248061$

Ans. 5248061

$c) \: 45337 \times 279$

$12649023$

Ans. 12649023

$d) \: 21097 \times 591$

$12468327$

Ans. 12468327

Hope it helps.