题目内容

计算.
208-900÷45
25.6-8.44-1.56 0.8×40×25×1.25
[1-(
1
2
-
1
4
)]×
2
3
11
15
-
9
5
÷3)÷
7
15
(1)208-900÷45,
=208-20,
=188;

(2)25.6-8.44-1.56,
=25.6-(8.44+1.56),
=25.6-10,
=15.6;

(3)0.8×40×25×1.25,
=(0.8×1.25)×(40×25),
=1×1000,
=1000;

(4)[1-(
1
2
-
1
4
)]×
2
3

=[1-
1
4
2
3

=
3
4
×
2
3

=
1
2


(5)(
11
15
-
9
5
÷3)÷
7
15

=(
11
15
-
9
15
)÷
7
15

=
2
15
÷
7
15

=
2
7
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