解:(1))(9.6-10
÷1.25)÷(1
×75%),
=(9.6-8.4)÷1,
=1.2÷1,
=1.2;
(2)
×39+
×25+
×
,
=
×13+
×25+
,
=(13+25+
)×
,
=40×
,
=30;
(3)
÷[32×(1-
)+
]
=
÷[32×
+
]
=
÷[12+
]
=
×
,
=
;
(4))[1
+2
÷(3
-1.125)]×
-
=[1
+
×
]×
-
,
=[1
+
]×
-
=
,
=
,
=
(5)0.125×
+
×8.25+12.5%+0.374×48+0.62×37.4-3.74,
=
×
+
×8.25+
+3.74×4.8+6.2×3.74-3.74,
=
×(0.75+8.25+1)+3.74×(4.8+6.2-1),
=
×10+3.74×10,
=1.25+37.4,
=38.65.
分析:(1)先算两个小括号里面的除法和乘法,再算第一个小括号里面的减法,最后算括号外的除法;
(2)根据乘法分配律进行计算,
(3)先算小括号里面的减法,再算中括号里面的乘法,然后算中括号里面的加法,最后算括号外的除法;
(4)先先算小括号里面的减法,再算中括号里面除法,接着算中括号里面的加法,然后算括号外的乘法,最后算括号外的减法;
(5)根据乘法分配律进行计算.
点评:本题综合考查了学生的计算能力,以及在计算中灵活运用简便算法的能力.