七年级数学同底数幂的除法练习(共2页).doc
精选优质文档-倾情为你奉上七年级数学同底数幂的除法练习 (2) 班级_姓名_学号_1填空: (1)当a0时,a0= (2)当a0,p为正整数时,a-p= (3)= , (4)= , (5)= ,(6)= , (7)= , (8) = ,2填空:(1)若有意义,则x , (2)若无意义,则x .(3)若()x=,则x=_ (4) ,则x=_ . (5)256b=25·211,则b=_. (6)若0.=3×10m,则 m=_3选择:(1)(33-3×9)0等于 ( ) A.1 B.0 C.12 D.无意义(2)计算后其结果为 ( )A.1;B.201;C.101;D.100.(3)若,d=, 则 ( ) A.a<b<c<d; B.b<a<d<c; C.a<d<c<b; D.c<a<d<b.(4)下列算术:,(0.0001)0=(1010)0,10-2=0.001,中,正确的算术有几个. ( ) A.0 B.1 C.2 D.34.计算:(1)a8÷a3÷a2 (2) (3) 5-16×(-2)-3 (4) (52×5-2+50)×5-3 (5) (6) (7) (8) (9) (10)(11) (a-b)10÷(b-a)4÷(a-b)3 (12)(-x2n-2)·(-x)5÷xn+1·xn·(-x)5. 若,求n的值.6.已知:,请你计算右边的算式求出S的值专心-专注-专业