问题 解答题
计算题
(1)81×[(4
1
7
+0.05×700)÷1
2
7
]

(2)(9
1
5
-10
1
2
÷1
1
4
)÷1
1
3

(3)[(2
2
3
+1.5)÷
5
6
-3
2
5
]÷2.8
答案

(1)81×[(4

1
7
+0.05×700)÷1
2
7
],

=81×[(4

1
7
+35)÷1
2
7
],

=81×(

274
7
×
7
9
),

=81×

274
9

=2466;

(2)(9

1
5
-10
1
2
÷1
1
4
)÷1
1
3

=(9

1
5
-8
2
5
÷1
1
3

=

4
5
×
3
4

=

3
5

(3)[(2

2
3
+1.5)÷
5
6
-3
2
5
]÷2.8,

=[

25
6
÷
5
6
-3
2
5
]÷2.8,

=(5-3

2
5
)÷2.8,

=

8
5
÷2.8,

=

4
7

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