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Stock Market – Estimate Net Gain or Loss (Nearest Ten)
publish date: 2026/05/08 23:24:27.630899 UTC
volume_mute
The Dow Jones Industrial Average changes for the week of October 13–17, 2008 were:
| Mon | Tue | Wed | Thu | Fri |
|---|---|---|---|---|
| +936 | −78 | −733 | +402 | −123 |
Round each number to the nearest ten and estimate the net gain or loss for the week.
Correct Answer
Gain of approximately 410 points
Explanation
Round each to the nearest ten: \(936 \to 940\), \(-78 \to -80\), \(-733 \to -730\), \(402 \to 400\), \(-123 \to -120\).
Add the positives: \(940 + 400 = 1{,}340\). Add the negatives: \(-80 + (-730) + (-120) = -930\). Net: \(1{,}340 + (-930) = 410\). Positive → net gain of approximately 410 points.
Reference
Mathematics for college students