Question

Estimate 203 x 739 by first rounding each number so that it has only 1 nonzero digit.

Answer 1

Given the product:

`203\cdot739`

Rounding these numbers to only one non-zero digit:

`\begin{gathered} 203\approx200 \\ 739\approx700 \end{gathered}`

Then, the estimation of the product is:

`203\cdot739\approx200\cdot700=140000`