0.5*0.8=0.4是什么梗

水侨潘982(8+0.8)x1.25 脱式计算 -
敖法卓17632653525 ______ =0.8*(1.25*0.4+2.5*0.4)=0.8*(0.5+1)=(0.8*0.5+0.8*1)=0.4+0.8=1.2

水侨潘9820.15乘以0.8乘以0.5用简便怎样算 -
敖法卓17632653525 ______ 0.15*0.8*0.5=0.15*0.4=0.06

水侨潘9820.8=() -
敖法卓17632653525 ______ 0.8*1=0.4*2=0.2*4=0.1*8=……

水侨潘98270.8 - 0.8*0.5 怎么简便计算? -
敖法卓17632653525 ______ 70.8-0.8*0.5 =70+0.8*﹙1-0.5﹚=70+0.4=70.4

水侨潘9820.8*(0.4*0.5)同类题 -
敖法卓17632653525 ______ 解: 0.8*(0.4*0.5) =0.8*0.2 =0.16 0.8*(0.4*0.5)=0.16

水侨潘9820.8比5等于0.4某数解比例 -
敖法卓17632653525 ______ x比5等于0.8比2.8解比例解:根据比例的基本性质解比例: x:5=0.8:2.8 2.8x=5*0.8 2.8x=4 x=4÷2.8 x=10/7

水侨潘9820.47*0.5*0.8的简便计算 -
敖法卓17632653525 ______[答案] =0.47*(0.5*0.8)=0.47*0.4=0.188

水侨潘9821.2减0.8的差被2个0.5的积除,商是多少 -
敖法卓17632653525 ______ (1.2-0.8)/(0.5*0.5)=1.6

水侨潘982[1.6 - 0.8]*0.5怎么简便
敖法卓17632653525 ______ [1.6-0.8]*0.5 =0.8*0.5 =0.4

水侨潘982(56.4/24+9.3*0.5)*0.8如何简算 -
敖法卓17632653525 ______[答案] 56.4/24*0.8+9.3*0.5*0.8 =56.4/24*0.8+9.3*0.5*0.8 =56.4/3/8*0.8+9.3*(0.5*0.8) =18.8*0.8/8+9.3*0.4 =18.8*(0.8/8)+3.72 =18.8*0.1+3.72 =1.88+3.72 =5.6