问题 解答题
脱式计算,能简算的要简算.
(1)475+660÷33×25        
(2)400-14
13
27
-85
14
27

(3)(
5
9
+
7
18
-
11
12
)×36
        
(4)5.84×1.36+1.36×3.16+1.36
(5)[1.9-6÷(2.4×5)]÷(14×0.2)
(6)[(
8
9
+
4
3
3
4
-
1
4
1
12
×
3
4
-
1
4
]÷
1
12
答案

(1)475+660÷33×25

=475+20×25

=475+500

=975;

(2)400-14

13
27
-85
14
27

=400-(14

13
27
+85
14
27

=400-100

=300;

(3)(

5
9
+
7
18
-
11
12
)×36

=

5
9
×36+
7
18
×36-
11
12
×36

=20+14-33

=1;

     

(4)5.84×1.36+1.36×3.16+1.36,

=(5.84+3.16+1)×1.36,

=10×1.36,

=13.6;

(5)[1.9-6÷(2.4×5)]÷(14×0.2)

=[1.9-6÷12]÷2.8

=[1.9-0.5]÷2.8

=1.4÷2.8

=0.5;

(6)[(

8
9
+
4
3
3
4
-
1
4
1
12
×
3
4
-
1
4
]÷
1
12

=[

20
9
×
3
4
-
1
4
1
12

=[

5
3
-
1
4
1
12

=

17
12
×12

=17.

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