5~6岁的儿童能通过实物操作或其他方式进行（ ）的加减运算。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27904' and id < 2291581 and id<>'2291581' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27904' and id > 2291581 and id<>'2291581' order by id asc limit 5