负数图示相反意义

Students add positive and negative numbers in an applet that simulates setting fence posts. Lesson: http://db.tt/M54hrk2q

 

冯圣军

 
教材タイプ
ワークシート
タグ
対象者層(年齢)
11 – 14
言語
English (United States)
 
 
 
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