Question

What are the maximum and minimum values for the measurement 15 cm?

Answer 1

Answer: (14.5cm, 15.4cm)

Explanation:

We have a measure of 15cm.

This may be a rounded up or rounded down number.

Now, when we want to round at a given digit, we need to see to the previous digit.

If the previous digit is larger than 5, then we round up.

If the previous digit is 5 or smaller, then we round down.

Then, the largest number such that we rounded down to 15cm, is:

15.4cm

The smallest number such that we rounded up to 15cm is:

14.5cm

Then the range of possible values is: