Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate(by rounding off to nearest tens) :(a)   439 + 334 + 4,317          (b)    1,08,734 – 47,599       (c)    8325 – 491(d)   4,89,348 – 48,365Make four more such examples.

Explanation

To solve the problem, we will find both rough estimates (by rounding to the nearest hundreds) and closer estimates (by rounding to the nearest tens) for each part of the question.

### (a) 439 + 334 + 4,317

**Step 1: Rough Estimate (Nearest Hundreds)**
- Round 439 to the nearest hundred: 439 is closer to 400.
- Round 334 to the nearest hundred: 334 is closer to 300.
- Round 4,317 to the nearest hundred: 4,317 is closer to 4,300.
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