题目内容

脱式计算.
12-14×5÷35
0.125×16×2.5(1.2+4.8÷0.6)-0.2
2
5
×
1
7
+
3
5
×
1
7
(1-
8
15
×0.5)÷11
5
6
÷[1-(
3
4
+
1
12
)].
(1)12-14×5÷35
=12-14×
1
7

=12-2,
=10;

(2)0.125×16×2.5
=0.125×4×4×2.5,
=(0.125×4)×(4×2.5),
=0.5×10,
=5;

(3)(1.2+4.8÷0.6)-0.2
=(1.2+8)-0.2,
=9.2-0.2,
=9;

(4)
2
5
×
1
7
+
3
5
×
1
7

=(
2
5
+
3
5
)×
1
7

=1×
1
7

=
1
7


(5)(1-
8
15
×0.5)÷11
=(1-
8
15
×
1
2
)÷11,
=(1-
4
15
)÷11,
=
11
15
×
1
11

=
1
15


(6)
5
6
÷[1-(
3
4
+
1
12
)]
=
5
6
÷
[1-
5
6
],
=
5
6
÷
1
6

=
5
6
×6,
=5.
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