解:(1)3.6÷40%×
,
=3.6÷0.4×0.1,
=9×0.1,
=0.9;
(2)3÷
-
÷3-3
,
=3×
-
×
-3
,
=4-
-3
,
=4-(
+3
),
=4-4,
=0;
(3)1
-
×[7
-(2
+0.125÷
)÷2],
=1
-
×[7
-(2
+
×4)÷2],
=1
-
×[7
-(2
+
)÷2],
=1
-
×[7
-3÷2],
=1
-
×[7
-1
],
=1
-
×6,
=1
-
,
=
;
(4)(2
-1
)×1.6÷(182×
),
=(
-
)×
÷26,
=
×
×
,
=
;
(5)[6-(
+
)×30]÷(1
×0.9),
=[6-(
)×30]÷(
),
=[6-
×30]÷
,
=[6-
]÷
,
=
×
,
=
;
(6)[13
-(4
+1.75×2)]÷3
,
=[13
-(4
+
×2)]÷3
,
=[13
-(4
+
)]÷3
,
=[13
-8]÷3
,
=
×
,
=
.
分析:(1)把百分數(shù)和分數(shù)化為小數(shù)計算比較簡便;
(2)把除法改為乘法,然后按運算順序計算,先算乘法,再算減法;
(3)(4)(5)(6)題,把小數(shù)化為分數(shù),然后按運算順序計算,先算小括號內(nèi)的,再算中括號內(nèi)的,最后算括號外的.
點評:此題考查了學生對分數(shù)四則混合運算順序的掌握情況,以及根據(jù)數(shù)字特點進行簡算的能力.