题目内容

计算:(能简算的要简算)
3.6×[2÷6×[2÷(
4
5
-0.6)]
8
13
×80×2
2
25
×1.25
1
8
-
1
4
÷4×
1
4
)÷
1
2

18
3
5
×
19
20
+2
2
5
×
19
20
-
19
20
(1)3.6×[2÷6×2÷(
4
5
-0.6)],
=3.6×[2÷6×2÷0.2],
=3.6×(
1
3
×2÷0.2),
=3.6×(
2
3
÷0.2),
=3.6×
10
3

=12;

(2)
8
13
×80×2
2
25
×1.25,
=(
8
13
×
52
25
)×(80×1.25),
=
32
25
×100,
=128;

(3)(
1
8
-
1
4
÷4×
1
4
)÷
1
2

=(
1
8
-
1
16
×
1
4
)÷
1
2

=(
1
8
-
1
64
)÷
1
2

=
7
64
×2,
=
7
32


(4)18
3
5
×
19
20
+2
2
5
×
19
20
-
19
20

=(18
3
5
+2
2
5
-1)×
19
20

=20×
19
20

=19.
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