问题 解答题
计算,能简算要简算
24×(
1
4
+
1
8
-
1
6
4
5
÷[(
1
3
+
2
5
)×
3
11
]
375+450÷18×252.5×1.25×32.
答案

(1)24×(

1
4
+
1
8
-
1
6
),

=24×

1
4
+24×
1
8
-24×
1
6

=6+3-4,

=9-4,

=5;

(2)

4
5
÷[(
1
3
+
2
5
)×
3
11
],

=

4
5
÷[
11
15
×
3
11
],

=

4
5
÷
1
5

=4;

(3)375+450÷18×25,

=375+25×25,

=375+625,

=1000;

(4)2.5×1.25×32,

=2.5×1.25×(4×8),

=(2.5×4)×(1.25×8),

=10×10,

=100.

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