54.9x0.38的简便计算方法

后堂胖126854.9x0.38怎么简便算 -
昌查苑18122077771 ______ 解:采用分配律,原式=54.9x0.38=54.9x(0.4-0.02)=54.9x0.4-54.9x0.02=21.96-1.098=20.878

后堂胖126854.9·x0.38的简便计算 -
昌查苑18122077771 ______ 54.9x0.38=(55-0.1)*0.38=55*0.38-0.1*0.38=20.9-0.038=20.862

后堂胖126854.9x0.38用简便算法怎么算 -
昌查苑18122077771 ______ 54.9*0.38 =(55-0.1)*0.38 =55*0.38-0.1*0.38 =55÷5*0.38*5-0.038 =11*1.9-0.038 =(10+1)*1.9-0.038 =20.9-0.038 =20.862

后堂胖126854.9Xo.38用简便方法 -
昌查苑18122077771 ______[答案] 54.9xo.38 =(50+5-0.1)*0.38 =50*0.38+5*0.38-0.1*0.38 =19+1.9-0.038 =20.9-0.038 =20.862

后堂胖126854.9xo.38这道题用简便计算怎么算 -
昌查苑18122077771 ______[答案] 54.9xo.38 =(50+5-0.1)*0.38 =50*0.38+5*0.38-0.1*0.38 =19+1.9-0.038 =20.9-0.038 =20.862

后堂胖126854.9XO.38的简便方法的答案到底是什么? -
昌查苑18122077771 ______ 54.9x0.38 =(55-0.1)x0.38 =55x0.38-0.1x0.38 =20.9-0.038 =20.862

后堂胖126854.9x0.38简便方法 -
昌查苑18122077771 ______ 54.9*0.38 =(55-0.1)*(0.4-0.02) =22-0.04-1.1+0.002 =22.002-1.14 =20.862

后堂胖126854.9xo.38这道题用简便计算怎么算 -
昌查苑18122077771 ______ 54.9xo.38=(50+5-0.1)*0.38=50*0.38+5*0.38-0.1*0.38=19+1.9-0.038=20.9-0.038=20.862

后堂胖1268简便运算54、9xO、38 -
昌查苑18122077771 ______ 54.9xo.38 =(50+5-0.1)*0.38 =50*0.38+5*0.38-0.1*0.38 =19+1.9-0.038 =20.9-0.038 =20.862

后堂胖126854点九乘以0.38的简便方法怎么算 -
昌查苑18122077771 ______ 解:54.9x0.38 =54.9x(0.4-0.02) =54.9x0.4-54.9x0.02 =21.96-1.098 =20.878 分析:主要考察拆分法的运用.