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2.75×数学公式+2数学公式÷2数学公式                          ( 数学公式+数学公式-数学公式 )×24       
8.08-4.73-1.08-1.27                      数学公式×[(1.5+数学公式 )÷( 数学公式-数学公式 )].

解:(1)2.75×+2÷2
=2×+2×
=2×(+),
=2×1,
=2

(2)(+-)×24,
=×24+×24-×24,
=6+4-2,
=8;

(3)8.08-4.73-1.08-1.27,
=(8.08-1.08)-(4.73+1.27),
=8-6,
=2;

(4)×[(1.5+)÷(-)],
=×[4÷],
=×
=
分析:(1)先把除法变成乘法,再运用乘法分配律简算;
(2)运用乘法分配律简算;
(3)根据减法的性质简算;
(4)先同时运用两个小括号里面的加法和减法,再算中括号里面的除法,最后算括号外乘法.
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
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