First, round each number to one nonzero digit. ​ Then, perform the calculation using the rounded numbers to obtain an estimate.
233 comma 079 comma 490 plus 259 comma 671 comma 750


Let's first round each number to one nonzero digit:

- \( 233,079,490 \) rounds to \( 200,000,000 \) (since 2 is the first nonzero digit).
- \( 259,671,750 \) rounds to \( 300,000,000 \) (since 3 is the first nonzero digit).

Now, perform the calculation using the rounded numbers:

\[
200,000,000 + 300,000,000 = 500,000,000
\]

Thus, the estimate of the sum is \( 500,000,000 \).

Do you want more details or have any questions?

Here are some related questions for practice:
1. Round \( 475,823 \) to one nonzero digit and perform an addition with \( 256,928 \).
2. Round \( 923,574 \) to one nonzero digit and subtract \( 678,432 \).
3. Estimate the sum of \( 8,742,365 + 5,999,276 \) by rounding to one nonzero digit.
4. Round \( 234,000 \) and \( 789,100 \) to the nearest million and add.
5. Estimate the product of \( 67,345 \times 23,890 \) by rounding each to one nonzero digit.

**Tip:** When rounding numbers to one nonzero digit, focus on simplifying the calculation while maintaining a reasonable estimate.

First, round each number to one nonzero digit. ​Then, perform the calculation using the rounded numbers to obtain an estimate. 233,079,490 plus 259,671,750

Learn how to round large numbers like 233,079,490 and 259,671,750 to one nonzero digit and estimate their sum. This step-by-step solution simplifies the problem, perfect for Grades 4-6 students learning rounding and estimation.

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