解:(1)
+
+
+
,
=(
)+(
),
=1+1,
=2;
(2)
+(
+
),
=
(
),
=
1,
=
;
(3)32×0.25×0.125,
=(4×0.25)×(8×0.125),
=1×1,
=1;
(4)0.75+0.125+
+
,
=(0.75+0.25)+(0.125+0.875),
=1+1,
=2.
分析:(1)
+
+
+
,運(yùn)用加法交換律和結(jié)合律進(jìn)行簡(jiǎn)算;
(2)
+(
+
),運(yùn)用加法交換律和結(jié)合律進(jìn)行簡(jiǎn)算;
(3)32×0.25×0.125,把32 分解為:4×8,然后運(yùn)用乘法交換律和結(jié)合律進(jìn)行簡(jiǎn)算;
(4)0.75+0.125+
+
,首先把分?jǐn)?shù)化成小數(shù),再運(yùn)用加法交換律和結(jié)合律進(jìn)行簡(jiǎn)算.
點(diǎn)評(píng):此題考查的目的是理解掌握加法、乘法的運(yùn)算定律,并且能夠運(yùn)用加法、乘法的運(yùn)算定律對(duì)分?jǐn)?shù)、小數(shù)四則混合運(yùn)算進(jìn)行簡(jiǎn)便計(jì)算.