问题 解答题
简算:
2.5×32×12.5  
8×5×(
2
5
-
1
8
)   
4.63+3
4
5
+5.37+7
1
5
17×
5
8
-
5
8
答案

(1)2.5×32×12.5,

=(2.5×4)×(8×12.5),

=10×100,

=1000;

(2)8×5×(

2
5
-
1
8
),

=40×

2
5
-40×
1
8

=16-5,

=11;

(3)4.63+3

4
5
+5.37+7
1
5

=(4.63+5.37)+(3

4
5
+7
1
5
),

=10+11,

=21;

(4)17×

5
8
-
5
8

=(17-1)×

5
8

=16×

5
8

=10.

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