(1)3720-4028÷38,
=3720-106,
=3614;
(2)78.192÷7.2-5.3×2.04,
=10.86-10.812,
=0.048;
(3)19÷([3/4]+[1/5]),
=19÷[19/20],
=20;
(4)43×[3/4]+57÷[4/3],
=43×[3/4]+57×[3/4],
=(43+57)×[3/4],
=100×[3/4],
=75.
(1)3720-4028÷38,
=3720-106,
=3614;
(2)78.192÷7.2-5.3×2.04,
=10.86-10.812,
=0.048;
(3)19÷([3/4]+[1/5]),
=19÷[19/20],
=20;
(4)43×[3/4]+57÷[4/3],
=43×[3/4]+57×[3/4],
=(43+57)×[3/4],
=100×[3/4],
=75.