广东省茂名市信宜市七年级数学上册第二章有理数及其运算2.9有理数的乘方同步作业(无答案)(新版)北师大版.doc

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12.9 有理数的乘方(1)班别 姓名 基础题:1.-43的意义是( ) A3 个-4 相乘 B3 个-4 相加 C-4 乘以 3 D4 3的相反数2.下列各式中成立的是( ) 3.7)9( 表示_个_相乘,指数是_, 底数是_.4.一个数的平方为 25,这个数可能是 .5. 课本 P59“知识技能”2(1) (2) (3)(4) (5) (6)提高题:1平方等于本身的数是_,立方等于本身的数是_ _.2下列算式的结果是正数的是( )A(3) 2 B(3) 2 C D3 2(3) 323在有理数-2,-(-2),-2 ,-2 ,(-2) ,(-2) ,-2 中,负数有( ) A3 个 B4 个 C5 个 D6 个2.9 有理数的乘方(2 )班别 姓名 2基础题:1将厚 0.1 毫米的一张纸对折,再对折,这样折 4 次,其厚度为( )毫米。A 0.4 B0.8 C0.32 D1.62n为正整数,则 =_, =_, = 。21n21n201323 2= ;(23) 2= 。4. 课本 P61“知识技能”1(1) (2) (3)(4) (5) (6)提高题:1. 若 02)1(ba ,求 320ba的值2规定一种运算“”满足: ab=a 2-b3 ,求(-5)(-2)的值。

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