2018年小升初数学衔接专题练习卷有理数的乘方专题201901123114.docx

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1、1有理数的乘方A卷12 3表示( ) A、222 B、23 C、33 D、2+2+2【答案】A2 2016)(的值是A. 1 B.1 C.2016 D.2016【答案】A3下列各式结果是负数的是()A、-(-3) B、3 C、-|-3| D、(-3) 2【答案】C.4有理数 4()与 ()A、互为相反数 B、互为倒数 C、相等 D、和为 82【答案】A.5 3(2)的值是()A6 B6 C8 D8【答案】D62 6中底数是 a,指数是 b,则 ab=【答案】47计算( ) 2 =23【答案】948计算:(1) (3) 2+12(2)39 (2)1 2015+24(2) 33 2( ) 213【

2、答案】 (1)11;(2)59若|a|=5,b 2=9,且 ab,求 ab 的值【答案】ab 的值为 2或 82B卷1计算 22+22+22+22的结果是()A2 3 B8 2 C2 4 D2 8【答案】C2下列各数 中,负数有()A2 个 B3 个 C4 个 D5 个【答案】B3下列计算中,错误的是( )A 62B 1)4(C 3D 0)(110【答案】D42 100( ) 99=( )12A2 B2 C D12 12【答案】B5下列各式中,不相等的是( )A (3) 2和3 2 B (3) 2和 32C (2) 3和2 3 D|2| 3和|2 3|【答案】A6若 x2=4,y 2=9,则|x+y|=【答案】1 或 57计算|1|+(2) 2=【答案】58计计算:(1)3+52(2) 34; 3(2)1 6|5|+2( ) 212【答案】 (1)9;(2) 1129若|x|=4,|y|=3,且 xy0,求(x+y) 2015的值【答案】当 x=4,y=3 时, (x+y) 2015=1;当 X=4,y=3 时, (x+y) 2015=1

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