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(1)0.35-10-(0.2+6.37÷0.7)×0.5(2)91×131+9÷13-1÷13×100(3)(451-471)×17-371(4)53.5×1.9+61×1.25+41×8.1(5)12×[(12+13)÷56](6)79×1415+56×19+19×715.

题目详情
(1)0.35-10-(0.2+6.37÷0.7)×0.5        
(2)91×
1
31
+9÷13-1÷13×100
(3)(
4
51
-
4
71
)×17-
3
71
                         
(4)53.5×1.9+61×1.25+41×8.1
(5)12×[( 
1
2
+
1
3
)÷
5
6
]
( 6)
7
9
×
14
15
+56×
1
9
+
1
9
×
7
15
▼优质解答
答案和解析
(1)0.35-10-(0.2+6.37÷0.7)×0.5,
=-9.65-(0.2+9.1)×0.5,
=-9.65-9.3×0.5,
=-9.65-4.65,
=-(9.65+4.65),
=-14.3;

(2)91×
1
31
+9÷13-1÷13×100,
=91×
1
31
+9×
1
13
-
1
13
×100,
=(91+9-100)×
1
13

=0×
1
13

=0;

(3)(
4
51
-
4
71
)×17-
3
71

=
4
51
×17-
4
71
×17-
3
71

=
4
3
-(
68
71
+
3
71
),
=
4
3
-1,
=
1
3


(4)53.5×1.9+61×1.25+41×8.1,
=53.5×(2-0.1)+(60+1)×1.25+(40+1)×8.1,
=53.5×2-53.5×0.1+60×1.25+1×1.25+40×8.1+1×8.1,
=107-5.35+75+1.25+324+8.1,
=(107+75+324)+(1.25-5.35+8.1),
=506+4,
=510;  

(5)12×[( 
1
2
+
1
3
)÷
5
6
],
=12×[
5
6
÷
5
6
],
=12×1,
=12;

( 6)
7
9
×
14
15
+56×
1
9
+
1
9
×
7
15

=
1
9
×7×
14
15
+56×
1
9
+
1
9
×
7
15

=(
98
15
+56+
7
15
)×
1
9

=63×
1
9

=7.