Question

Estimate the product by first rounding each number to the highest place value. 2.49 X 420.2

Answer 1

Given the expression:

`2.49\text{ x }420.2`

first let's roud to the highest place value each term:

`\begin{gathered} 2.49\approx2.5\approx3 \\ 420.2\approx420\approx400 \\ \end{gathered}`

then, an estimate product is:

`3\cdot400=1200`

which is close to the original product:

`2.49\cdot420.2=1046.3`