问题 解答题
用递等式计算:
(1)2108+540÷18×24
(2)(
1
3
+2
1
2
)÷(2+3
2
3

(3)
4
7
×[0.75-(
7
16
-0.25)]

(4)[1
1
8
+(0.65+
7
20
1
7
]×4.8.
答案

(1)2108+540÷18×24,

=2108+30×24,

=2108+720,

=2828;

(2)(

1
3
+2
1
2
)÷(2+3
2
3
),

=2

5
6
÷5
2
3

=

1
2

(3)

4
7
×[0.75-(
7
16
-0.25)],

=

4
7
×[0.75-
3
16
],

=

4
7
×
9
16

=

9
28

(4)[1

1
8
+(0.65+
7
20
1
7
]×4.8,

=[1

1
8
+1÷
1
7
]×4.8,

=[1

1
8
+7]×4.8,

=8

1
8
×4.8,

=39.

问答题
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