题目内容

3×25%+3×
3
4
1
3
+
2
3
÷50%
1
6
+
1
10
+
2
15
)×30
1
4
÷(1-
1
2
-
1
4
5
8
×36+
3
8
×36-36
400÷(1+
1
3
)-200×
1
20
5
6
×(
2
5
×
1
7
27×
4
5
+27÷5.
(1)3×25%+3×
3
4

=3×(25%+
3
4
),
=3×(
1
4
+
3
4
),
=3×1,
=3;

(2)
1
3
+
2
3
÷50%,
=
1
3
+
2
3
÷
1
2

=
1
3
+
2
3
×2,
=
1
3
+
4
3

=
5
3


(3)(
1
6
+
1
10
+
2
15
)×30,
=
1
6
×30+
1
10
×30+
2
15
×30,
=5+3+4,
=12;

(4)
1
4
÷(1-
1
2
-
1
4
),
=
1
4
÷
1
4

=1;

(5)
5
8
×36+
3
8
×36-36,
=(
5
8
+
3
8
-1)×36,
=0×36,
=0;

(6)400÷(1+
1
3
)-200×
1
20

=400÷
4
3
-10,
=400×
3
4
-10,
=300-10,
=290;

(7)
5
6
×(
2
5
×
1
7
),
=
5
6
×
2
5
×
1
7

=
1
21


(8)27×
4
5
+27÷5,
=27×
4
5
+27×
1
5

=27×(
4
5
+
1
5
),
=27×1,
=27.
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