题目内容

递等式计算(能简算的要简算)
1
4
-
1
10
÷2
÷
3
10
2
5
×
6
11
+40%×
5
11
17×(
1
15
+
2
17
)×15
4
5
÷[(
1
3
+
2
5
)×
4
11
]
27
5
-1.8)÷[(1.15+
13
20
)×
5
3
].
(1)(
1
4
-
1
10
÷2
÷
3
10

=(
1
4
-
1
20
)×
10
3

=
1
5
×
10
3

=
2
3


(2)
2
5
×
6
11
+40%×
5
11

=
2
5
×
6
11
+
2
5
×
5
11

=
2
5
×(
6
11
+
5
11
),
=
2
5
×1,
=
2
5


(3)17×(
1
15
+
2
17
)×15
=
1
15
×15×17+
2
17
×17×15,
=17+30,
=47;

(4)
4
5
÷[(
1
3
+
2
5
)×
4
11
]
=
4
5
÷[
11
15
×
4
11
],
=
4
5
×
15
4

=3;

(5)(
27
5
-1.8)÷[(1.15+
13
20
)×
5
3
]
=(5.4-1.8)÷[(1.15+0.65)×
5
3
],
=3.6÷[1.8×
5
3
],
=3.6÷3,
=1.2.
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