用計(jì)算器開方課件

1、,5　用計(jì)算器開方,學(xué)前溫故,新課早知,,1.一般地,如果一個正數(shù)x的平方等于a,即x2=a,那么這個正數(shù)x就叫做a的　　　　　,記為　　　　　. 2.一般地,如果一個數(shù)x的立方等于a,即x3=a,那么這個數(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,,,被開方數(shù),=,SHIFT,,,被

2、開方數(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,1,2,3,4,5,6,1.用計(jì)算器求2 015的算術(shù)平方根時(shí),下列四個鍵中,必須按的鍵是(　　)A.sinB.yxC.D.x2,,答案,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,1,2,4,3,5,6,答案,2.按鍵SHIFT 5 7 6 =顯示的結(jié)果(精確到0.001)為(　　)A.83.203B.8.320C.-8.320D.8.203,,輕松嘗

3、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,1,2,4,3,5,6,3.對于的值,下列關(guān)系式正確的是(　　)A.55<<60B.65<<70C.75<<80D.85<<90,,答案,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,1,2,4,3,5,6,4.用計(jì)算器計(jì)算的按鍵順序是　　　　　.,,答案,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,1,2,4,3,5,6,5.