题目内容

怎样简便就怎样算
1
4
+
3
4
×3

3×(
2
15
+
1
12
)-
1
4
24×(
3
8
+
1
3
+
5
12
9
17
÷7+
1
7
×
8
17
26
27
×28
5
12
-
3
7
)-(
4
7
-
7
12
(1)
1
4
+
3
4
×3,
=
1
4
+
9
4

=
5
2


(2)3×(
2
15
+
1
12
)-
1
4

=3×
2
15
+3×
1
12
-
1
4

=
2
5
+
1
4
-
1
4

=
2
5
+(
1
4
-
1
4
),
=
2
5
+0,
=
2
5


(3)24×(
3
8
+
1
3
+
5
12
),
=24×
3
8
+24×
1
3
+24×
5
12

=9+8+10,
=27;

(4)
9
17
÷7+
1
7
×
8
17

=
9
17
×
1
7
+
1
7
×
8
17

=(
9
17
+
8
17
)×
1
7

=1×
1
7

=
1
7


(5)
26
27
×28,
=
26
27
×(27+1),
=
26
27
×27+
26
27
×1,
=26+
26
27

=26
26
27


(6)(
5
12
-
3
7
)-(
4
7
-
7
12
),
=
5
12
-
3
7
-
4
7
+
7
12

=(
5
12
+
7
12
)-(
3
7
+
4
7
),
=1-1,
=0.
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