题目内容

脱式计算下面各题.
0.7÷[(
5
6
-
1
4
)×24]
(0.125×8-0.5)×42
1
2
÷(
5
7
+2
1
2
(1)0.7÷[(
5
6
-
1
4
)×24]
=0.7÷[
7
12
×24],
=0.7÷14,
=0.05.

(2)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;

(3)2
1
2
÷(
5
7
+2
1
2

=
5
2
÷
45
14

=
7
9
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