Question

計(jì)算：sin60°-|-

1

2

|-

1

3 +1

-(

1

2

)-1

Answer 1

分析：本題涉及絕對(duì)值、負(fù)整數(shù)指數(shù)冪、特殊角的三角函數(shù)值、二次根式化簡四個(gè)考點(diǎn)．在計(jì)算時(shí)，需要針對(duì)每個(gè)考點(diǎn)分別進(jìn)行計(jì)算，然后根據(jù)實(shí)數(shù)的運(yùn)算法則求得計(jì)算結(jié)果．

解答：原式=

3

2

-

1

2

-

3 -1

2

-2
=-2

點(diǎn)評(píng)：本題主要考查了實(shí)數(shù)的綜合運(yùn)算能力，是各地中考題中常見的計(jì)算題型．解決此類題目的關(guān)鍵是熟記特殊角的三角函數(shù)值，熟練掌握負(fù)整數(shù)指數(shù)冪、零指數(shù)冪、二次根式、絕對(duì)值等考點(diǎn)的運(yùn)算．