题目内容
怎样简便就怎样算 ÷3+× | ÷++ | -)× |
3-×- | ÷[(+)×] | 24× |
[4-(-)]× | 26× | +×+ |
+(1--) |
(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×-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.
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