题目内容
| 怎样简便就怎样算 | ||
| 3- | 24× | |
| [4-( | 26× | |
(1)
,
=
,
=(
)×
,
=1×
,
=
,
(2)
,
=
,
=
,
=1
,
=1
,
(3)
,
=
×
-
×
,
=10
,
=1
,
(4)3-
×
,
=3-
,
=3-(
),
=3-1,
=2,
(5)
÷【(
+
)×
】,
=
÷【
×
】,
=
÷
,
=3,
(6)
,
=(25-1)×
,
=25×
-1×
,
=4-
,
=
,
(7)【4-(
)】×
,
=【4-
】×
,
=
×
,
=
,
(8)26×
,
=(25+1)×
,
=25×
+1×
,
=4+
,
=4
,
(9)
,
=
,
=
,
=
,
(10)
,
=
,
=
.
分析:按照分数的四则混合运算的顺序,结合运算定律即可解决此类问题.
点评:抓住运算定律的特点,各算式中能简便的要简便.
=
=(
=1×
=
(2)
=
=
=1
=1
(3)
=
=10
=1
(4)3-
=3-
=3-(
=3-1,
=2,
(5)
=
=
=3,
(6)
=(25-1)×
=25×
=4-
=
(7)【4-(
=【4-
=
=
(8)26×
=(25+1)×
=25×
=4+
=4
(9)
=
=
=
(10)
=
=
分析:按照分数的四则混合运算的顺序,结合运算定律即可解决此类问题.
点评:抓住运算定律的特点,各算式中能简便的要简便.
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