计算+-18.76-3.47-0.530.75+++3-+3++51--.
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解:(1)+-,
=(-)+,
=+,
=;
(2)18.76-3.47-0.53,
=18.76-(3.47+0.53),
=18.76-4,
=14.76;
(3)0.75+++,
=(0.75+)+(+),
=(075+0.25)+1,
=1+1,
=2;
(4)3-+,
=(3+)-,
=4-,
=3;
(5)3++5,
=(3+5)+(),
=9+1,
=10;
(6)1--,
=1-(+),
=1-1,
=0.
解析分析:(1)运用加法交换律与结合律简算;(2)(6)运用减法的性质简算;(3)(4)(5)运用加法交换律与结合律简算.
点评:完成此题,注意运用所学定律或性质进行简算.