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(2012•武定县模拟)混合运算.(能简算的要简算)45×102=;716×40-516÷140=;7.85-1.89-2.11+2.15=;3450+450÷18×15=;40÷[(34-13)×3]=;168.8÷(24.3×2-6.4)=

题目详情
(2012•武定县模拟)混合运算.(能简算的要简算)
45×102=______;
7
16
×40-
5
16
÷
1
40
=______;           
7.85-1.89-2.11+2.15=______;
3450+450÷18×15=______;        
40÷[(
3
4
-
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.


7
16
×40-
5
16
÷
1
40
=______;           
7.85-1.89-2.11+2.15=______;
3450+450÷18×15=______;        
40÷[(
3
4
-
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.
7
16
771616
5
16
÷
1
40
=______;           
7.85-1.89-2.11+2.15=______;
3450+450÷18×15=______;        
40÷[(
3
4
-
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.
5
16
551616
1
40
=______;           
7.85-1.89-2.11+2.15=______;
3450+450÷18×15=______;        
40÷[(
3
4
-
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.
1
40
114040


3
4
-
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.
3
4
3344
1
3
)×3]=______;
168.8÷(24.3×2-6.4)=______.
1
3
1133
▼优质解答
答案和解析
(1)45×102
=45×(100+2),
=45×100+45×2,
=4500+90,
=4590;

(2)
7
16
×40-
5
16
÷
1
40

=
7
16
×40-
5
16
×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
7
16
777161616×40-
5
16
÷
1
40

=
7
16
×40-
5
16
×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
5
16
555161616÷
1
40

=
7
16
×40-
5
16
×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
1
40
111404040
=
7
16
×40-
5
16
×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
7
16
777161616×40-
5
16
×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
5
16
555161616×40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
7
16
777161616-
5
16
)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
5
16
555161616)×40,
=
1
8
×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
1
8
111888×40,
=5;

(3)7.85-1.89-2.11+2.15
=7.85+2.15-(1.89+2.11),
=10-4,
=6;

(4)3450+450÷18×15
=3450+25×15,
=3450+375,
=3825;

(5)40÷[(
3
4
-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
3
4
333444-
1
3
)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
1
3
111333)×3]
=40÷[
5
12
×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
5
12
555121212×3],
=40×
4
5

=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.
4
5
444555,
=32;

(6)168.8÷(24.3×2-6.4)
=168.8÷(48.6-6.4),
=168.8÷42.2,
=4.
故答案为:4590,5,6,3825,32,4.