题目内容

14×70-624÷632×0.125×2.5
14
5
-
1
3
-
5
3
5
7
÷9+
4
7
×
1
9
(
2
3
+
5
7
×
7
24
7
8
7
11
÷[
2
5
-(1-
7
10
)]
(1)14×70-624÷6,
=980-104,
=876;

(2)32×0.125×2.5,
=4×8×0.125×2.5,
=8×0.125×(4×2.5),
=1×10,
=10;

(3)
14
5
-
1
3
-
5
3

=
14
5
-(
1
3
+
5
3
),
=
14
5
-2,
=
4
5


(4)
5
7
÷9+
4
7
×
1
9

=
5
7
×
1
9
+
4
7
×
1
9

=(
5
7
+
4
7
)×
1
9

=
9
7
×
1
9

=
1
7


(5)(
2
3
+
5
7
×
7
24
)÷
7
8

=(
2
3
+
5
24
)×
8
7

=
7
8
×
8
7

=1;

(6)
7
11
÷[
2
5
-(1-
7
10
)],
=
7
11
÷[
2
5
-
3
10
],
=
7
11
÷
1
10

=
7
11
×10,
=
70
11
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