(1)135÷27+12×4
=5+48
=53;
(2)1620-1320÷60×70
=1620-22×70
=1620-1540
=80;
(3)520÷[13×(43-39)]
=520÷[13×4]
=520÷52
=10;
(4)(841-41)÷25×4
=800÷25×4
=32×4
=128;
(5)[160-(75+38)]×107
=[160-113]×107
=47×107
=5029;
(6)125×(8+4)×25
=125×8×25+125×4×25
=25000+12500
=37500.