题目内容

用递等式计算(能简算得就要简算)
3
4
×
2
5
+
3
5
×
3
4
1
4
+
5
14
+
3
4
)÷
1
7
6.5×6+3.5×6-35
1
7
8
×
5
9
+
5
9
×0.125-
5
9
0.35÷[(
5
6
-
2
3
)×3]
2
3
÷(
2
3
+
1
5
)÷
1
13
-10.
(1)
3
4
×
2
5
+
3
5
×
3
4

=(
2
5
+
3
5
)×
3
4

=1×
3
4

=
3
4


(2)(
1
4
+
5
14
+
3
4
)÷
1
7

=(
1
4
+
3
4
+
5
14
)×7,
=(1+
5
14
)×7,
=1×7+
5
14
×7+,
=7+
5
2

=9
1
2


(3)6.5×6+3.5×6-35,
=(6.5+3.5)×6-35,
=10×6-35,
=60-35,
=25;

(4)1
7
8
×
5
9
+
5
9
×0.125-
5
9

=(1
7
8
+0.125-1)×
5
9

=(2-1)×
5
9

=1×
5
9

=
5
9


(5)0.35÷[(
5
6
-
2
3
)×3],
=0.35÷[
1
6
×3],
=0.35÷
1
2

=0.7,

(6)
2
3
÷(
2
3
+
1
5
)÷
1
13
-10,
=
2
3
÷
13
15
÷
1
13
-10,
=
10
13
÷
1
13
-10,
=10-10,
=0.
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