解(1)(×)
8×
3
5 +8×
2
5 +8
=8×(
3
5 +
2
5 +1)
=16;
(2)(×)
14.3- (
3
5 +2.4÷2
2
3 )
=14.3-(
3
5 +2.4×
3
8 )
=14.3-1.5,
=12.8;
(3)(×)
(
11
14 -
5
7 +
5
28 ) ×84+101
=84×
11
14 -84×
5
7 +84×
5
28 +101,
=66-60+15+101,
=122;
(4)(√)
故答案为:(1)×,(2)×,(3)×,(4)√.