Circuit and condition
The description is basically saying to consider the current meters ideal.  Ideal current meters don't drop any voltage, so appear to have 0 &Omega; resistance.  Real meters don't, of course, which can alter the measurement.

They are trying to make it easy for you by telling you it's OK to ignore the non-ideal resistance of the current meters.  Basically, proceed as if the current meters are ideal, meaning they look like dead shorts to the circuit.