#4: Rounding Whole Numbers

Question 1

In many real-world situations, an exact value is not needed. Let’s suppose you were comparing the price of three used cars:
Ford: $15,195
Mazda: $17,889
Chevy: $28,135

Answer 1

It would be much easier to remember the prices as:
Ford: $15,000
Mazda: $18,000
Chevy: $28,000

Question 2

Approximations are

Answer 2

values that are close to the actual value, but not exactly the same.

Question 3

Rounding a Whole Number:

Answer 3

1- Locate the digit in the round-off place (e.g., If Rounding to the nearest ten, we identify the digit in the tens’ place)
2- If the digit to the right of the round off place is:
less than 5 (0,1,2,3, or 4) - leave the digit in the round-off place unchanged
5 or larger (5,6,7,8, or 9) - increase the round-off place digit by 1
3- Replace each digit to the right of the round-off place with a zero