Question

A student said we cannot subtract 1.97 from 20 because 1.97 has two decimal digits and 20 has none. Do you agree with his statement? Explain or show your reasoning.

Answer 1

Just add a decimal after 20 because it is a whole number.
20.00 - 1.97 = 18.03
Just remember to line up your decimals when subtracting.

Answer 2

No

Explanation:

everything has a infinite amount of zeroes behind the decimal point or where it ends at least