题目内容

1
2
÷
1
2
+
1
2
×
1
2
1
2
×
1
2
+
1
2
÷
1
2
1
2
×
1
2
÷
1
2
-
1
2
45×
1
2
1
2
-
1
2
)÷
1
2
1
2
÷(1-
1
2
1
2
×4-(
1
2
+
1
2
5-
1
2
-0.125.
(1)
1
2
÷
1
2
+
1
2
×
1
2

=1+
1
4

=1
1
4


(2)
1
2
×
1
2
+
1
2
÷
1
2

=
1
4
+1,
=1
1
4


(3)
1
2
×
1
2
÷
1
2
-
1
2

=
1
2
×
1
2
×2-
1
2

=
1
2
-
1
2

=0;

(4)45×
1
2
=22
1
2


(5)(
1
2
-
1
2
)÷
1
2

=0÷
1
2

=0;

(6)
1
2
÷(1-
1
2
),
=
1
2
÷
1
2

=1;

(7)
1
2
×4-(
1
2
+
1
2
),
=2-1,
=1;

(8)5-
1
2
-0.125,
=4.5-0.125,
=4.375.
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