99x9.9的简便计算

陶奔省3624简便计算:9.9*9.9+0.99 -
暴旭刚13687177308 ______ :9.9*9.9+0.99 =99x0.99+0.99 =0.99x(99+1) =0.99x100 =99

陶奔省36249.9X9.9的简便算法 -
暴旭刚13687177308 ______ 解:9.9*9.9=9.9*(10-0.1)=9.9*10-9.9*0.1=99-0.99=98.01

陶奔省36249.9*99的简便计算方法 -
暴旭刚13687177308 ______ 9.9*99 =9.9*100-9.9 =990-9.9 =980.1

陶奔省362499x9,简便计算. -
暴旭刚13687177308 ______[答案] (100—1)X9 =100X9—9 =900-9 =891

陶奔省3624简算 托试计算9.9乘9.9+9.9=?简算 -
暴旭刚13687177308 ______[答案] 9.9*9.9+9.9=9.9*(10-0.1)+10-0.1 =99-0.99+10-0.1 =109-1.09 =107.91

陶奔省3624是什么99x9的简便方法 -
暴旭刚13687177308 ______[答案] (100—1)X9 =100X9—9 =900-9 =891

陶奔省36249.9*99+9.9简便算法怎算? -
暴旭刚13687177308 ______[答案] 9.9*99+9.9 =9.9*(99+1) =9.9*100 =990

陶奔省36249.9*99+9.9怎样简算 -
暴旭刚13687177308 ______ 9.9*100

陶奔省362499*99+9的简便算法运用什幺方法四年上册数学1 -
暴旭刚13687177308 ______[答案] 99x(100-1)+9 =9900-99+9 =9900-90=9810

陶奔省36249.9*99怎样简便计算
暴旭刚13687177308 ______ 9.9x(100-1) =9.9x100-1x9.9 =990-9.9 =980.1