问题 解答题
简算,并写出简算过程.
23-
12
17
-
5
17

44×(
5
11
-
1
4

7.5×46.7+52.3×7.5+7.5
1
4
+13÷4-19×0.25
[
3
5
-(
3
4
-
2
5
)]÷4.
答案

(1)23-

12
17
-
5
17

=23-(

12
17
+
5
17
),

=23-1,

=22;

(2)44×(

5
11
-
1
4

=44×

5
11
-44×
1
4

=20-11,

=9;

(3)7.5×46.7+52.3×7.5+7.5

=(46.7+52.3+1)×7.5,

=100×7.5,

=750;

(4)6×

1
4
+13÷4-19×0.25

=6×

1
4
+13×
1
4
-19×
1
4

=(6+13-19)×

1
4

=0×

1
4

=0;

(5)[

3
5
-(
3
4
-
2
5
)]÷4

=[

3
5
+
2
5
-
3
4
]÷4,

=[1-

3
4
]÷4,

=

1
4
×
1
4

=

1
16

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