物理

Numerical values of physical quantities used in problem solving
is approximate. Be careful when working with approximate numbers.
Otherwise, a lot of time can be wasted. For example, from adults
taking one to the nearest tenth, and the other to the nearest hundredth,
it makes absolutely no sense to calculate the answer with greater precision.
Because from the second digit after the comma, the result is doubtful and
the effort to identify them is futile. Don't let that happen
to bring all the given for to one xiI accuracy and from it
only then you need to start the calculation.