Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens): 4, 89, 348 - 48, 365

Step 2: Let us round off to tens.

If 0, 1, 2, 3, or 4 are the one's digits then round to the previous ten, and if 5, 6, 7, 8, or 9 are the one's digits then round to the next ten.

Rounding 4, 39, 348 to the nearest tens = 4, 89, 350

Rounding 48, 365 to the nearest tens = 48, 370

By subtraction,

4, 89, 350 - 48, 370 = 4, 40, 980

Therefore, using rounding off to hundreds answer is 4, 40, 900, and using rounding off to tens answer is 4, 40, 980.

Summary:

Give a rough estimate (by rounding off to the nearest hundreds) and also a closer estimate (by rounding off to nearest tens): 4, 89, 348 - 48, 365

The rough estimate of 4, 89, 348 — 48, 365 (by rounding off to nearest hundreds) and also a closer estimate of 4, 89, 348 — 48, 365 (by rounding off to nearest tens) are 4, 40, 900 and 4, 40, 980.