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7.8 同底数幂相除

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7.8 同底数幂相除. 第 1 课时. 授课人：帅美玲. 引导性材料：. 填空：. 请把（ 2 ）式改写成除法形式. (2)( )×2 3 =2 5 ; 10 3 ×( )=10 5 ; a 2 ·( )=a 6. 2 2. (1)2 2 ×2 3 =( ); 10 3 ×10 2 = ( ); a 2 ·a 4 =( ). 2 5. 10 5. 10 2. a 6. a 4. 改写后为：. 2 5 ÷2 3 = （ );

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7.8 同底数幂相除

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  1. 7.8同底数幂相除 第1课时 授课人：帅美玲

  2. 引导性材料： 填空： 请把（2）式改写成除法形式 (2)( )×23=25; 103×( )=105; a2·( )=a6. 22 (1)22×23=( ); 103×102= ( ); a2·a4=( ). 25 105 102 a6 a4

  3. 改写后为： 25÷23=（ ); 105÷103=( ); a6÷a2=(). 22 102 a4

  4. 7、8同底数幂相除 观察下题的特点，你能总 结出什么规律？ 25÷23= 22 105÷103= 102 a6÷a2=a4

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