(1)(
-
)×
+
×
(2)11.4×52%-1.4×0.52
(3)
×27+
×19 (4)
×6+9÷
-
.解:(1)(
-
)×
+
×
,=(
-
+
)×
,=1×
,=
;(2)11.4×52%-1.4×0.52,
=11.4×0.52-1.4×0.52,
=(11.4-1.4)×0.52,
=10×0.52,
=5.2;
(3)
×27+
×19,=
×(27+19),=
×46,=32;
(4)
×6+9÷
-
,=
×6+9×
-
,=(6+9-1)×
,=14×
,=12.
分析:(1)(3)运用乘法分配律简算;
(2)把52%化为小数,运用乘法分配律简算;
(4)把除法改为乘法,运用乘法分配律简算.
点评:此题重点考查学生对乘法分配律的掌握与运用,同时注意灵活处理式中数据.