Answer:
To estimate the subtraction of 493.078 by 13.861, you can round each number to a convenient place value. Let's round them to one decimal place:
493.078 ≈ 493.1
13.861 ≈ 13.9
Now subtract the rounded numbers:
493.1 - 13.9 = 479.2
So, the estimated result is approximately 479.2.
Explanation: