Question

Estimate product of 183*154 by rounding off first number upward and the second number downwards​

Answer 1

First no. 183 upward =200

Second no. 154 downward =100

So, Estimated product =200×100=20000

Answer 2

Given:

Estimate 183 x 154 by rounding first number upwards and second number downwards;

To Find:

The estimated answer

Concept Used:

When rounding upwards or downwards, unless specifically specify, we always round to the 1 significant figure.

Steps

Calculating,

Round the first number upwards

183 ≈ 200

Round the second number downwards

154 ≈ 100

Find the estimated value:

183 x 154  ≈ 200 x 100

183 x 154  ≈ 20000