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脱式计算(能简算的要简便计算)27+6.7+57+22.3;813÷7+17×513;12.5×3.2×0.25;49÷[45-(15+13)].

题目详情
脱式计算(能简算的要简便计算)
2
7
+6.7+
5
7
+22.3;
8
13
÷7+
1
7
×
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].

2
7
+6.7+
5
7
+22.3;
8
13
÷7+
1
7
×
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].
2
7
2277
5
7
+22.3;
8
13
÷7+
1
7
×
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].
5
7
5577
8
13
÷7+
1
7
×
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].
8
13
881313
1
7
×
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].
1
7
1177
5
13

12.5×3.2×0.25;
4
9
÷[
4
5
-(
1
5
+
1
3
)].
5
13
551313

4
9
÷[
4
5
-(
1
5
+
1
3
)].
4
9
4499
4
5
-(
1
5
+
1
3
)].
4
5
4455
1
5
+
1
3
)].
1
5
1155+
1
3
)].
1
3
1133
▼优质解答
答案和解析
(1)
2
7
+6.7+
5
7
+22.3
=(
2
7
+
5
7
)+(6.7+22.3)
=1+29
=30;

(2)
8
13
÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
2
7
222777+6.7+
5
7
+22.3
=(
2
7
+
5
7
)+(6.7+22.3)
=1+29
=30;

(2)
8
13
÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
5
7
555777+22.3
=(
2
7
+
5
7
)+(6.7+22.3)
=1+29
=30;

(2)
8
13
÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
2
7
222777+
5
7
)+(6.7+22.3)
=1+29
=30;

(2)
8
13
÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
5
7
555777)+(6.7+22.3)
=1+29
=30;

(2)
8
13
÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
8
13
888131313÷7+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
1
7
111777×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
5
13
555131313
=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
8
13
888131313+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
5
13
555131313)×
1
7

=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
1
7
111777
=1×
1
7

=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
1
7
111777
=
1
7


(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
1
7
111777;

(3)12.5×3.2×0.25
=(12.5×8)×(0.4×0.25)
=100×0.1
=10;

(4)
4
9
÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
4
9
444999÷[
4
5
-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
4
5
444555-(
1
5
+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
1
5
111555+
1
3
)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
+
1
3
111333)]
=
4
9
÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
4
9
444999÷[
4
5
-
8
15
]
=
4
9
÷
4
15

=1
2
3
4
5
444555-
8
15
]
=
4
9
÷
4
15

=1
2
3
8
15
888151515]
=
4
9
÷
4
15

=1
2
3
4
9
444999÷
4
15

=1
2
3
4
15
444151515
=1
2
3
2
3
222333.