(1)(12
2
7
-4
3
5
÷2.3)÷(10
2
7
÷0.875)

(2)7.08+8.13×12.9÷(86×40.65)
(3)(2.25×
25
27
-16÷9)×(54-26+181-174+46)×100

(4)[3
1
4
-(0.2+
1
3
)×4
1
2
+0.5]÷13.5%
分析:(1)在計算過程中可根據(jù)一個數(shù)除以兩個數(shù)的商,等于用這個數(shù)除惟兩個數(shù)中的被除數(shù),乘以除數(shù)的除法性質(zhì)計算;
(2)(4)根據(jù)四則混合運算的運算順序計算即可:先算乘除,再算加減,有括號的要先算括號里面的;
(3)可根據(jù)加法交換律及結(jié)合律計算后面括號里面的算式.
解答:解:(1)(12
2
7
-4
3
5
÷2.3)÷(10
2
7
÷0.875)

=(12
2
7
-4.6÷2.3)÷(
72
7
÷
7
8
),
=(12
2
7
-2)÷
72
7
×
8
7
,
=
72
7
÷
72
7
×
8
7
,
=
8
7

(2)7.08+8.13×12.9÷(86×40.65)
=7.08+104.877÷3495.9,
=7.08+0.03,
=7.11;
(3)(2.25×
25
27
-16÷9)×(54-26+181-174+46)×100

=(
9
4
×
25
27
-
4
3
)×[(54+46)+181-(26+174)]×100,
=(
25
12
-
4
3
)×(100+181-200)×100,
=
3
4
×81×100,
=6075;

(4)[3
1
4
-(0.2+
1
3
)×4
1
2
+0.5]÷13.5%

=[3
1
4
-(
1
5
+
1
3
)×
9
2
+
1
2
]÷13.5%,
=(3
1
4
-
8
15
×
9
2
+
1
2
)÷13.5%,
=(3
1
4
-
12
5
+
1
2
)÷13.5%,
=1.35÷0.135,
=10.
點評:本題中的數(shù)據(jù)較為復雜,完成時要細心分析式中數(shù)據(jù),能簡便計算的要簡便計算.
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