(1)24-24×
5
6 ,
=24-20
=4,
(2)5÷
9
10 ×
3
5 ,
=5×
10
9 ×
3
5 ,
=
10
3 ,
(3)4×
5
12 ÷
5
9 ,
=4×
5
12 ×
9
5 ,
=3,
(4)70.8-1.25-1.75,
=70.8-(1.25+1.75),
=70.8-3,
=77.8,
(5)
11
9 ×3.8-3.8×
2
9 ,
=3.8×(
11
9 -
2
9 ),
=3.8×1,
=3.8.
(6)(
3
8 +
2
3 )÷
1
24 ,
=(
3
8 +
2
3 )×24,
=
3
8 ×24+
2
3 ×24,
=9+16,
=25.