(2008•威海)下列計(jì)算正確的是( )
A.
B.x5+x5=x10
C.x8÷x2=x4
D.(-a32=a6
【答案】分析:根據(jù)負(fù)整數(shù)指數(shù)冪、冪的乘方與積的乘方、零指數(shù)冪、同底數(shù)冪的除法、合并同類項(xiàng)等知識(shí)點(diǎn)進(jìn)行解答.
解答:解:A、(-×3-1=1×=;故不對(duì);
B、x5+x5=2x5;故不對(duì);
C、x8÷x2=x6;故不對(duì);
D、(-a32=a6,正確;
故選D.
點(diǎn)評(píng):主要考查了零指數(shù)冪,負(fù)指數(shù)冪和平方的運(yùn)算.負(fù)指數(shù)為正指數(shù)的倒數(shù);任何非0數(shù)的0次冪等于1.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:初中數(shù)學(xué) 來(lái)源:2008年全國(guó)中考數(shù)學(xué)試題匯編《數(shù)據(jù)收集與處理》(07)(解析版) 題型:解答題

(2008•威海)甲,乙兩支儀仗隊(duì)隊(duì)員的身高(單位:厘米)如下:
甲隊(duì):178,177,179,178,177,178,177,179,178,179;
乙隊(duì):178,179,176,178,180,178,176,178,177,180;
(1)將下表填完整:
身高176177178179180
甲隊(duì)(人數(shù))34
乙隊(duì)(人數(shù))211
(2)甲隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米,乙隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米;
(3)你認(rèn)為哪支儀仗隊(duì)更為整齊?簡(jiǎn)要說(shuō)明理由.

查看答案和解析>>

科目:初中數(shù)學(xué) 來(lái)源:2010年廣東省汕頭市濠江區(qū)中考數(shù)學(xué)模擬試卷(解析版) 題型:解答題

(2008•威海)甲,乙兩支儀仗隊(duì)隊(duì)員的身高(單位:厘米)如下:
甲隊(duì):178,177,179,178,177,178,177,179,178,179;
乙隊(duì):178,179,176,178,180,178,176,178,177,180;
(1)將下表填完整:
身高176177178179180
甲隊(duì)(人數(shù))34
乙隊(duì)(人數(shù))211
(2)甲隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米,乙隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米;
(3)你認(rèn)為哪支儀仗隊(duì)更為整齊?簡(jiǎn)要說(shuō)明理由.

查看答案和解析>>

科目:初中數(shù)學(xué) 來(lái)源:2009年山東省泰安市中考數(shù)學(xué)模擬試卷(2)(解析版) 題型:解答題

(2008•威海)甲,乙兩支儀仗隊(duì)隊(duì)員的身高(單位:厘米)如下:
甲隊(duì):178,177,179,178,177,178,177,179,178,179;
乙隊(duì):178,179,176,178,180,178,176,178,177,180;
(1)將下表填完整:
身高176177178179180
甲隊(duì)(人數(shù))34
乙隊(duì)(人數(shù))211
(2)甲隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米,乙隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米;
(3)你認(rèn)為哪支儀仗隊(duì)更為整齊?簡(jiǎn)要說(shuō)明理由.

查看答案和解析>>

科目:初中數(shù)學(xué) 來(lái)源:2009年福建省泉州市德化縣初中學(xué)業(yè)質(zhì)量檢查數(shù)學(xué)試卷(一)(解析版) 題型:解答題

(2008•威海)甲,乙兩支儀仗隊(duì)隊(duì)員的身高(單位:厘米)如下:
甲隊(duì):178,177,179,178,177,178,177,179,178,179;
乙隊(duì):178,179,176,178,180,178,176,178,177,180;
(1)將下表填完整:
身高176177178179180
甲隊(duì)(人數(shù))34
乙隊(duì)(人數(shù))211
(2)甲隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米,乙隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米;
(3)你認(rèn)為哪支儀仗隊(duì)更為整齊?簡(jiǎn)要說(shuō)明理由.

查看答案和解析>>

科目:初中數(shù)學(xué) 來(lái)源:2008年山東省威海市中考數(shù)學(xué)試卷(解析版) 題型:解答題

(2008•威海)甲,乙兩支儀仗隊(duì)隊(duì)員的身高(單位:厘米)如下:
甲隊(duì):178,177,179,178,177,178,177,179,178,179;
乙隊(duì):178,179,176,178,180,178,176,178,177,180;
(1)將下表填完整:
身高176177178179180
甲隊(duì)(人數(shù))34
乙隊(duì)(人數(shù))211
(2)甲隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米,乙隊(duì)隊(duì)員身高的平均數(shù)為_(kāi)_____厘米;
(3)你認(rèn)為哪支儀仗隊(duì)更為整齊?簡(jiǎn)要說(shuō)明理由.

查看答案和解析>>

同步練習(xí)冊(cè)答案