Question

Use rounding to determine whether the following answers are reasonable.a. 96 ÷ 48 = 20b. 713 ÷ 99 = 72

Answer 1

In the following expression Division process is shown :

a)

Given expression : 96 ÷ 48 = 20

Since on dividing 96 by 48 we get quotient 2

i.e on multilpy 2 by 48=96

$\begin{gathered} 98\div48=2 \\ \text{ since, 2}\ne20 \end{gathered}$

Thus, the answer 20 is not correct and the expression 96 ÷ 48 = 20 is not reasonable.

b).

Given expression : 713 ÷ 99 = 72​

On dividing 713 by 99 we get 7.2020

$\begin{gathered} 713\div99=7.2020 \\ \text{ On round of to the figure 7.2020} \\ 7.2020\approx7 \end{gathered}$

So, the expression 713 ÷ 99 = 72​ is not reasobale.