2018年七年级数学下册《1.1同底数幂的乘法》如何学好同底数幂的乘法素材（新版）北师大版.doc

. 10 2 3 100000 10 5 10 2+3 2 1 2 3 1 2 11 22 111 222 5 1 2 23 1 2 . m n a m a n n na a a a m ma a a a m n a a a a a m+n . a m a n a m+n m n . . . a m a n a m+n m n a m a n a q a m+n q m n q . . . 1 23 11 33 . 1 3 . 3 2 3 1 3 1 . 243 1 3 1 3 1 5 3 2 2 2005 2005 54 2 14 5 . . 1 1 5 14 14 5 5 4 2 14 5 2005 2005 2005 2005 3 (x+y) m (x+y) 2m 1 (x+y) 2m+1 . x+y . (x+y) m (x+y) 2m 1 (x+y) 2m+1 (x+y) m+2m 1+2m+1 (x+y) 5m . 4 m p 5 1 m q 7 m r 7 5 . m p+q+r . m p+q+r m p m q m r . m p+q+r m p m q m r m p = 5 1 m q =7 m r = 7 5 m p+q+r m p m q m r 5 1 7 5 ) 1.