543-254-57-146怎么简便计算?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 10:42:30
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543-254-57-146怎么简便计算?
543-254-57-146怎么简便计算?
543-254-57-146怎么简便计算?
543-254-57-146
=543-57-(254+146)
=486-400
=86
543-254-57-146
=543-(254+146)-57
=543-400-57
=143-57
=86
543-57-(254+146)