问题 解答题
能简算的要简算
(1)2.5×12.5×32
(2)1375+450÷18×25
(3)
5
6
×0.25+
1
4
×
1
6

(4)
2
3
×[(
5
8
+0.75)÷
5
8
]
答案

(1)2.5×12.5×32

=(2.5×4)×(12.5×8),

=10×100,

=1000;

(2)1375+450÷18×25

=1375+25×25,

=1375+625,

=2000;

(3)

5
6
×0.25+
1
4
×
1
6

=0.25×(

5
6
+
1
6
),

=0.25;

(4)

2
3
×[(
5
8
+0.75)÷
5
8
]

=

2
3
×[
5
8
÷
5
8
+
3
4
÷
5
8
],

=

2
3
×[1+
6
5
],

=

2
3
×
11
5

=

22
15

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