问题 解答题
计算.
208-900÷45
25.6-8.44-1.560.8×40×25×1.25
[1-(
1
2
-
1
4
)]×
2
3
11
15
-
9
5
÷3)÷
7
15
答案

(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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