题目内容

计算
(1)0.25÷[
4
7
×(1-
1
8
)
]
(2)375+450÷18
(3)
9
8
×
4
3
+(1-
2
3
)
(4)(0.75-
1
12

(1)0.25÷[
4
7
×(1-
1
8
)
],
=0.25÷[
4
7
×
7
8
],
=0.25÷
1
2

=0.5;

(2)375+450÷18,
=375+25,
=400;

(3)
9
8
×
4
3
+(1-
2
3
)

=
9
8
×
4
3
+
1
3

=
3
2
+
1
3

=
11
6


(4)0.75-
1
12

=
3
4
-
1
12

=
2
3
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