问题 解答题
计算:(要求写出主要计算过程)
(1)[2÷(5.4-3
1
4
)×1
4
3
]÷3
8
9

(2)[(10.75-4
11
12
)×2
7
11
]÷[(1.125+
1
12
)÷(2.25÷10
10
11
)].
答案

(1)[2÷(5.4-3

1
4
)×1
4
3
]÷3
8
9

=[2÷(

27
5
-
13
4
)×
7
3
9
35

=[2÷(

108
20
-
65
20
)×
7
3
9
35

=[2÷

43
20
×
7
3
9
35

=2×

20
43
×
7
3
×
9
35

=(2×

20
43
)×(
7
3
×
9
35
),

=

40
43
×
3
5

=

24
43

(2)[(10.75-4

11
12
)×2
7
11
]÷[(1.125+
1
12
)÷(2.25÷10
10
11
)],

=[(10

9
12
-4
11
12
)×
29
11
]÷[(
9
8
+
1
12
)÷(
9
4
÷
120
11
)],

=[

35
6
×
29
11
]÷[
29
24
÷
480
99
],

=

35
6
×
29
11
÷[
29
24
×
99
480
],

=

35
6
×
29
11
÷
29
24
÷
99
480

=

35
6
×
29
11
×
24
29
×
99
480

=

21
8

=2

5
8

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