题目内容

①782-(534-218)
②786-479+279
③875-(347+375)
④786+479-279
⑤972+52-804-52+804
⑥849-828+528-36-164.

解:①782-(534-218),
=782+218-534,
=1000-534,
=466;

②786-479+279,
=786-(479-279),
=786-200,
=586;

③875-(347+375),
=875-375-347,
=500-347,
=153;

④786+479-279,
=786+(479-279),
=786+200,
=986;

⑤972+52-804-52+804,
=972+(52-52)+(804-804),
=972+0+0,
=972;

⑥849-828+528-36-164,
=21+528-(36+164),
=549-200,
=349.
分析:①782-(534-218),根据减法的运算性质进行简算;
②786-479+279,根据加、减法的运算性质进行简算;
③875-(347+375),根据减法的运算性质进行简算;
④786+479-279,根据加、减法的运算性质进行简算;
⑤972+52-804-52+804,根据加、减法的运算性质进行简算;
⑥849-828+528-36-164,根据加、减法的运算性质进行简算;
点评:此题考查的目的是理解掌握加、减法的运算性质,并且能够灵活运用加、减法的运算性质进行简便计算.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网