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脱式计算(能简便的要简算)(1)580+522÷29×15;(2)14.87-3.34-5.66;(3)34+14÷(1-45);(4)1.25×3.2×2.5;(5)42×(13+57-214);(6)75×[1÷(23-15)].

题目详情
脱式计算(能简便的要简算)
(1)580+522÷29×15;   
(2)14.87-3.34-5.66;     
(3)
3
4
+
1
4
÷(1-
4
5
);
(4)1.25×3.2×2.5;     
(5)42×(
1
3
+
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].



3
4
+
1
4
÷(1-
4
5
);
(4)1.25×3.2×2.5;     
(5)42×(
1
3
+
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
3
4
3344
1
4
÷(1-
4
5
);
(4)1.25×3.2×2.5;     
(5)42×(
1
3
+
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
1
4
1144
4
5
);
(4)1.25×3.2×2.5;     
(5)42×(
1
3
+
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
4
5
4455

1
3
+
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
1
3
1133
5
7
-
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
5
7
5577
2
14
);     
(6)
7
5
×[1÷(
2
3
-
1
5
)].
2
14
221414
7
5
×[1÷(
2
3
-
1
5
)].
7
5
7755
2
3
-
1
5
)].
2
3
2233
1
5
)].
1
5
1155
▼优质解答
答案和解析
(1)580+522÷29×15
=580+18×15
=580+270
=850;

(2)14.87-3.34-5.66
=14.87-(3.34+5.66)
=14.87-9
=5.87;
 
(3)
3
4
+
1
4
÷(1-
4
5

=
3
4
+
1
4
÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
3
4
333444+
1
4
÷(1-
4
5

=
3
4
+
1
4
÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
4
111444÷(1-
4
5

=
3
4
+
1
4
÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
4
5
444555)
=
3
4
+
1
4
÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
3
4
333444+
1
4
÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
4
111444÷
1
5

=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
5
111555
=
3
4
+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
3
4
333444+
5
4

=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
5
4
555444
=2;

(4)1.25×3.2×2.5
=1.25×(8×0.4)×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10;

(5)42×(
1
3
+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
3
111333+
5
7
-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
5
7
555777-
2
14

=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
2
14
222141414)
=42×
1
3
+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
3
111333+42×
5
7
-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
5
7
555777-42×
2
14

=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
2
14
222141414
=14+30-6
=44-6
=38;

(6)
7
5
×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
7
5
777555×[1÷(
2
3
-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
2
3
222333-
1
5
)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
1
5
111555)]
=
7
5
×[1÷
7
15
]
=
7
5
×
15
7

=3.
7
5
777555×[1÷
7
15
]
=
7
5
×
15
7

=3.
7
15
777151515]
=
7
5
×
15
7

=3.
7
5
777555×
15
7

=3.
15
7
151515777
=3.