【新北師大版】八年級(jí)數(shù)學(xué)上冊(cè)：2.5用計(jì)算器開(kāi)方ppt課件

1、精 品 數(shù) 學(xué) 課 件2019 屆 北 師 大 版 5 5用計(jì)算器開(kāi)方用計(jì)算器開(kāi)方學(xué)前溫故新課早知1.一般地,如果一個(gè)正數(shù)x的平方等于a,即x2=a,那么這個(gè)正數(shù)x就叫做a的,記為.2.一般地,如果一個(gè)數(shù)x的立方等于a,即x3=a,那么這個(gè)數(shù)x就叫做a的,記為.3.用計(jì)算器計(jì)算1.23的按鍵順序是.算術(shù)平方根立方根1 2 x3 =學(xué)前溫故新課早知被開(kāi)方數(shù)=shift被開(kāi)方數(shù)=輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用1234561.用計(jì)算器求2 015的算術(shù)平方根時(shí),下列四個(gè)鍵中,必須按的鍵是()a.sinb.yxc.d.x2 答案 答案關(guān)

2、閉輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用124356 答案 答案關(guān)閉2.按鍵shift 5 7 6 =顯示的結(jié)果(精確到0.001)為()a.83.203 b.8.320c.-8.320d.8.203輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用1243563.對(duì)于的值,下列關(guān)系式正確的是()a.5560b.6570c.7580 d.8590 答案 答案關(guān)閉輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用1243564.用計(jì)算器計(jì)算的按鍵順序是. 答案 答案關(guān)閉輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用1243565.用計(jì)算器計(jì)算,所得的近似數(shù)是.(結(jié)果保留兩位小數(shù)) 答案 答案關(guān)閉輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用輕松嘗試應(yīng)用124356 答案 答案關(guān)閉6.利用計(jì)算器計(jì)算:(1