解:
(1)4.96-(1.3+2.96),
=4.96-1.3-2.96,
=4.96-2.96-1.3,
=2-1.3,
=0.7;
(2)5600÷25÷8,
=5600÷(25×8),
=5600÷200,
=28;
(3)1
÷
-
×2
,
=1
×
-
×
,
=(1
-
)×
,
=
×
,
=
;
(4)
×
+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(5)
=x:
,
x÷
=
,
x÷
×
=
×
x=
;
(6)2x-3.57+1.43=10,
2x-2.14=10,
2x-2.14+2.14=10+2.14,
2x=12.14,
2x÷2=12.14÷2,
x=6.07.
分析:(1)根據(jù)連減的性質(zhì)進(jìn)行計(jì)算;
(2)根據(jù)連除的性質(zhì)進(jìn)行計(jì)算;
(3)根據(jù)乘法分配律進(jìn)行計(jì)算;
(4)根據(jù)乘法分配律進(jìn)行計(jì)算;
(5)根據(jù)等式的性質(zhì)進(jìn)行解答;
(6)根據(jù)等式的性質(zhì)進(jìn)行解答.
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)、小數(shù)的四則混合運(yùn)算的運(yùn)算順序和應(yīng)用運(yùn)算定律進(jìn)行簡(jiǎn)便計(jì)算.