问题 解答题
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
)]
答案

(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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