题目内容

脱式计算.(能简算则简算).
[
5
14
+(
4
7
-
1
2
)]×
7
9
7
13
÷8+12.5%×
6
13
(50%-
5
12
+
1
6
)×12.
(1)[
5
14
+(
4
7
-
1
2
)]×
7
9

=[
5
14
+
1
14
7
9

=
3
7
×
7
9

=
1
3


(2)
7
13
÷8+12.5%×
6
13

=
7
13
×
1
8
+
1
8
×
6
13

=
1
8
×(
7
13
+
6
13
),
=
1
8
×1,
=
1
8


(3)(50%-
5
12
+
1
6
)×12,
=(
1
2
-
5
12
+
1
6
)×12,
=
1
2
×12-
5
12
×12+
1
6
×12,
=6-5+2,
=3.
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