反复应用运算定律、性质进行简算。如:

① 0.125×1.2×(12.7-2.3-2.4)

=0.125×1.2×〔12.7-(2.3+2.4)〕

=0.125×1.2×8

=0.125×8×1.2

=1.2

②1.4×98+3×1.4

=1.4×(98+3) (98+3=101=100+1)

=1.4×100+1.4

=140+1.4

=141.4