同底数幂相乘例题引领1.计算:(1)107×104;(2)x2·x5.2.计算:(1)23×24×25(2)y·y2·y3练习一1. 计算:(抢答)(1)105×106(2)a7·a3(3)x5·x5(4)b5·b2. 计算:(1)x10·x(2)10×102×104(3)x5·x·x3(4)y4·y3·y2·y练习二下面的计算对不对?如果不对,怎样改正?(1)b5·b5=2b5()(2)b5+b5=b10()(3)x5·x5=x25()(4)y5·y5=2y10()(5)c·c3=c3()(6)m+m3=m4()变式训练填空:(1)x5·()= x8(2)a·()= a6(3)x·x3()=x7(4)xm·( )=x3m思考题1.计算:(1)xn·xn+1(2)(x+y)3·(x+y)42.填空:(1)8=2x,则x=;(2)8×4=2x,则x=;(3)3×27×9=3x,则x=.合作、探究:计算(1)35(—3)3(—3)2(2)—a(—a)4(—a)3(3)xp(—x)2p(—x)2p+1(p为正整数)(4)32×(—2)2n(—2)(n为正整数)2、计算(1)(2a+b)3(2a+b)m-4(2a+b)2n+1(2)(x—y)2(y—x)5
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