Question

Estimate the sum of 924,945 + 65,819 + 2,445 + 34,472 by rounding each number to the nearest thousand.

Answer 1

Here, we could just add the numbers up, however, the question explicit asks for you to, firstly, round each number to the nearest thousand. This way, we can add them easily, costing the result to be an estamate, not the exact result.

Let's do the roundings:

`\begin{gathered} 924,945\approx925\text{ thousands} \\ 65,819\approx66\text{ thousands} \\ 2,445\approx2\text{ thousands} \\ 34,472\approx34\text{ thousands} \end{gathered}`

Notice that we approximated each to the nearest, so the first two went up, and the last two down, because they were the nearest.

Now we sum them up:

`925+66+2+34=1027\text{ thousands}`

So, the estimate sum is 1027 thousands, or 1,027,000 approximately.