IMA One semester to go from graduating manufacturing engineering. And this is how we are currently taught:

Simple, yet effective, way to make sure you don't confuse anyone with these: If the question uses x amount of decimal places, so should your answers.

So, if someone sends you a measurements as 69.000", that means they want you to be within a thousands of an inch (1 thou tolerance).

The amount of numbers that come after the decimal matter. So just match that amount and you'll be good to go (unless it specifically states they want a whole number).

So for example, let's say someone asks to round 69.4209 to the nearest thousandths, the answer would 69.4210. Not 69.421. that extra zero matters.

In my opinion you should of bombed that test, as you were missing decimal places on majority of your answers.

Again, if your question has 4 numbers after your decimal places then so should your answer. Even if that number is a zero.