Question

Will rounding to the nearest 10 or 100 give a closer estimate of 748-431?

Answer 1

Rounding to the nearest 10 will give a closer estimate of 748 - 431.

To prove,

Difference,

748 - 431

317

Difference by rounding to the nearest 10,

750 - 430

320

Difference by rounding to the nearest 100,

600 - 400

20