题目内容

计算下面各题,能用简便方法的要用简便方法.
4
11
×
1
7
÷
4
7

11
21
×
1
8
+
10
21
÷8
(15-15×
4
5
)×
7
24

[
4
5
-0÷(
1
3
+
2
5
)]×
5
8

(34+
34
47
)÷17
5
6
+
2
9
)×
4
5
÷
19
20
(1)
4
11
×
1
7
÷
4
7

=
4
11
×
1
7
×
7
4

=
4
11
×(
1
7
×
7
4
),
=
4
11
×
1
4

=
1
11


(2)
11
21
×
1
8
+
10
21
÷8,
=
11
21
×
1
8
+
10
21
×
1
8

=(
11
21
+
10
21
)×
1
8

=1×
1
8

=
1
8


(3)(15-15×
4
5
)×
7
24

=(15-12)×
7
24

=3×
7
24

=
7
8


(4)[
4
5
-0÷(
1
3
+
2
5
)]×
5
8

=[
4
5
-0]×
5
8

=
4
5
×
5
8

=
1
2


(5)(34+
34
47
)÷17,
=(34+
34
47
)×
1
17

=34×
1
17
+
34
47
×
1
17

=2+
2
47

=2
2
47


(6)(
5
6
+
2
9
)×
4
5
÷
19
20

=
19
18
×
4
5
×
20
19

=
19
18
×
20
19
×
4
5

=
10
9
×
4
5

=
8
9
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