题目内容

1
2
+
1
2
-
1
2
1
2
×
1
2
+
1
2
÷
1
2
1
2
-
1
2
)×88
13-48×(
1
2
+
1
2
1
2
÷3+
1
2
×
1
2
1
2
+
1
2
×
1
2
+
1
2
1
2
×
1
2
+
1
2
×
1
2
+
1
2
(1)
1
2
+
1
2
-
1
2

=
1
2
+(
1
2
-
1
2

=
1
2
+0
=
1
2


(2)
1
2
×
1
2
+
1
2
÷
1
2

=
1
4
+1
=1
1
4


(3)(
1
2
-
1
2
)×88
=0×88
=0;

(4)13-48×(
1
2
+
1
2

=13-48×1
=13-48
=-35;

(5)
1
2
÷3+
1
2
×
1
2

=
1
6
+
1
4

=
5
12


(6)
1
2
+
1
2
×
1
2
+
1
2

=
1
2
+
1
4
+
1
2

=
1
2
+
1
2
+
1
4

=1+
1
4

=1
1
4


(7)
1
2
×
1
2
+
1
2
×
1
2
+
1
2

=
1
2
×(
1
2
+
1
2
+1)
=
1
2
×2
=1.
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