问题 解答题
计算
(1)[5-3
7
8
÷(1
5
6
+2.25×
1
3
)]÷12.50%    
(2)[2-(8.25-5
1
3
)×
2
3
]÷0.9.
答案

(1)[5-3

7
8
÷(1
5
6
+2.25×
1
3
)]÷12.50%,

=[5-3

7
8
÷(
11
6
+
3
4
)]×8,

=[5-

31
8
×
12
31
]×8,

=3.5×8,

=28;

(2)[2-(8.25-5

1
3
)×
2
3
]÷0.9,

=[2-(8.25-5

1
3
)×
2
3
]÷0.9

=[2-(

99
12
-
64
12
)×
2
3
]÷0.9,

=[2-

35
12
×
2
3
10
9

=

1
18
×
10
9

=

5
81

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