gbt22796-2021是纯棉吗

权钟翠4074795 - 202+205怎样简便计算 -
仇伏荀18395998515 ______ 795-202+205怎样简便计算=(795+205)-200-2=1000-200-2=800-2=798

权钟翠4074简便计算0.72*202 -
仇伏荀18395998515 ______ 0.72*202=0.72x(200+2)=0.72x200+0.72x2=144+1.44=145.44

权钟翠4074749+202简便计算 -
仇伏荀18395998515 ______ =(750-1)+(200+2) =750+200-1+2 =951

权钟翠4074569 - 202.怎样简便运算? -
仇伏荀18395998515 ______ 解:569-202等于( 367 ) ∵已知需求出569-202等于多少 X - Y = Z ∴569 - 202 = (600 - 31)- (200 + 2) = 600 - 31 - 200 - 2 = (600 - 200)+(-31 - 2) = 400 - 33 = 367 答:569-202等于367

权钟翠4074从179起按规律写到202,除了按顺序加1写,还有什么规律. -
仇伏荀18395998515 ______ 在179的基础上 加23

权钟翠4074201*202202 - 202*201201的简便算法 -
仇伏荀18395998515 ______[答案] 201*202202-202*201201 = 201*(202 * 1001) - 202*(201*1001) = 201*202*1001 - 201*202*1001 = 0

权钟翠4074估算202+269,可以想()+()=(),所以 202+269~() -
仇伏荀18395998515 ______ 估算202+269,可以想(200)+(270)=(470),所以 202+269~(470)

权钟翠4074202*5.6简便计算 -
仇伏荀18395998515 ______ 202*5.6=200x5.6+2x5.6=1120+11.2=1131.2

权钟翠4074159十202怎么算简便 -
仇伏荀18395998515 ______ 159十202=160-1+200+2=361