问题 解答题
计算,能用简便方法的要用简便方法计算.
9
14
÷8+
1
8
×
5
14
11
13
÷[(
5
8
+
3
4
)÷
5
8
]
25
18
÷5×
7
12
×
9
35
19
20
-(
3
5
+2×
1
8
答案

(1)

9
14
÷8+
1
8
×
5
14

=

9
14
×
1
8
+
1
8
×
5
14

=(

9
14
+
5
14
)×
1
8

=1×

1
8

=

1
8

(2)

11
13
÷[(
5
8
+
3
4
)÷
5
8
],

=

11
13
÷[
11
8
÷
5
8
],

=

11
13
÷
11
5

=

5
13

(3)

25
18
÷5×
7
12
×
9
35

=

5
18
×
7
12
×
9
35

=

5
18
×
9
35
×
7
12

=

1
14
×
7
12

=

1
24

(4)

19
20
-(
3
5
+2×
1
8
),

=

19
20
-(
3
5
+
1
4
),

=

19
20
-
17
20

=

1
10

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