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①[(9
1
5
-7
1
2
)÷2
3
4
]÷1
1
5

②0.52×2
4
9
+7
5
9
×0.52
③(1
2
5
-
4
5
)×(2+
2
3
)÷1
3
5

④[(4.25-3
1
8
)×2.4+10÷6
1
4
]÷0.13
⑤24×(
7
12
+
5
6
)÷(6.375-5
3
8

⑥(15
3
5
÷3-2
2
3
×1
7
8
)÷1
3
8
分析:完成本題根據(jù)四則混合運算法則計算即可,能簡算的要據(jù)運算定律簡算.
解答:解:(1)[(9
1
5
-7
1
2
)÷2
3
4
]÷1
1
5

=[
17
10
÷
11
4
]÷
6
5
;
=
34
55
×
5
6
;
=
17
33
;

(2)0.52×2
4
9
+7
5
9
×0.52
=(2
4
9
+7
5
9
)×0.52;
=10×0.52;
=5.2;

(3)(1
2
5
-
4
5
)×(2+
2
3
)÷1
3
5

=
3
5
×(
8
3
×
5
8
);
=
3
5
×
5
3
;
=1;

(4)[(4.25-3
1
8
)×2.4+10÷6
1
4
]÷0.13
=[(4
1
4
-3
1
8
)×2
2
5
+10÷
25
4
13
100
;
=[
9
8
×
12
5
+10×
4
25
13
100

=[
27
10
+
8
5
]÷
13
100
;
=
43
10
×
100
13
;
=33
1
13
;

(5)24×(
7
12
+
5
6
)÷(6.375-5
3
8

=24×
17
12
÷(6
3
8
- 5
3
8
);
=34×1;
=34;

(6)(15
3
5
÷3-2
2
3
×1
7
8
)÷1
3
8

=(
78
5
×
1
3
-
8
3
×
15
8
÷
11
8

=(
26
5
-5)×
8
11
;
=
1
5
×
8
11
;
=
8
55
點評:完成本題要認真分析式中數(shù)據(jù),特別要注意分數(shù)、小數(shù)之間的轉(zhuǎn)化.
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