题目内容

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.
(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.
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