They are not.
Yes, rounding is one way to estimate.
Rounding is estimating.
Estimating is neither better nor worse than rounding. The two are used for different purposes.
Rounding, you see the number and just make it look neater or easier to use. Estimating, you guess a number.
By rounding the factors, then quickly multiplying them in your head.
Estimating is a guess that should be close to the answer. Round is rounding a number up to the nearest ten, hundred. Example $345.89 round to the nearest dollar is $345.
It is - if you use appropriate rounding. Rounding does not have to be to whole numbers.
it's the Same thing
if you had an adding sum we would use it and if you were estimating
Rounding factors can lead to underestimates or overestimates: the outcome depends on the rounding.