(1)(
1
8−
1
6+
1
4)×24,
=[1/8]×24-[1/6]×24+[1/4]×24,
=3-4+6,
=3+6-4,
=5;
(2)[3/10+3.9+0.7+
1
10],
=0.3+3.9+0.7+0.1,
=(0.3+0.7)+(3.9+0.1),
=1+4,
=5.
(1)(
1
8−
1
6+
1
4)×24,
=[1/8]×24-[1/6]×24+[1/4]×24,
=3-4+6,
=3+6-4,
=5;
(2)[3/10+3.9+0.7+
1
10],
=0.3+3.9+0.7+0.1,
=(0.3+0.7)+(3.9+0.1),
=1+4,
=5.