÷4+÷??????????????(-+)÷?????????????÷+÷×??????????????×27÷??????????????????2000÷.
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解:(1)÷4+÷,
=×+×,
=×(),
=×1,
=.
(2)(-+)÷,
=×12-×12+×12,
=10-3+4,
=11;
(3)+,
=×+,
=+,
=;
(4)÷×,
=×22×,
=7;
(5)×27÷,
=×27×,
=16;
(6)2000÷,
=(1999+1)×,
=1999×+1×,
=2000+,
=2001.
解析分析:(1)把除法化成乘法,再运用乘法的分配律进行解答,
(2)运用乘法的分配律进行解答,
(3)先算除法,再加法,
(4)从左向右进行计算即可,
(5)从左向右进行计算即可,
(6)把2000化成1999+1,再运用乘法的分配律进行解答.
点评:此题考查了分数四则混合运算的顺序,注意能运用运算定律简算的要简算.