[en] The I-V characteristics and the resultant total energies have been calculated full numerically for the parallel arranged multi-hole superconducting quantum interference devices (SQUIDs) consisting of Bi₂Sr₂CaCu₂O_8+δ high-T_c superconductors intrinsic Josephson junctions (BSCCO-IJJs). It has been found that (I) the effect of charge coupling between neighboring Josephson junctions is not so important, (II) the effect of noise is not so crucial except for the case of low β_L and no external magnetic field, and (III) a reliable external magnetic field dependence is obtained when the β_L is less than about 0.5, where the β_L is a dimensionless parameter defined by L_loopI_c/Φ₀ using a loop inductance L_loop of a SQUID, a critical current I_c of a junction, and a flux quantum Φ₀. We have pointed out that (IV) the steps which differ from Shapiro steps are found when an external ac modulation current is applied to the parallel arranged multi-hole SQUIDs, and (V) the I-V characteristics of a double hole BSCCO-IJJs-SQUID trapping a flux quantum can be controlled as a function of the external magnetic field.