Chapter 1, Problem 12QC

To determine

To Evaluate: Estimate of $1210÷398$

Answer to Problem 12QC

  $3$

Explanation of Solution

Given information:

  $1210÷398$

Concept Used:

Estimate of any value numerical value can be found by rounding it to its nearest ten

For example: estimate of 12 would be 10 and that of 18 would be 20.

Calculation:

We can write-

  $1210÷398\approx 1210÷400(Round\text{ 1210 and 398 to}\text{nearest 10)}$

Hence,

  $\begin{array}{l}400\begin{array}{c}\hfill 3.025\\ \hfill \overline{)1210}\end{array}\\ \underset{\_}{-1200}\\ 1000\\ \underset{\_}{-800}\\ 2000\\ \underset{\_}{-2000}\\ \underset{\_}{0}\end{array}$

Therefore,

  $1210÷398\approx 3.025\approx 3$