用7.75,1.55,0.31找规律
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/18 16:49:01
How_Tall_(tall)isSally?She's1.55metres_inheight_(tall).(用适当形式填空)
2×8.75²-2×7.75²=2x(8.75-7.75)x(8.75+7.75)=2x1x16.5=33
3.25+1.67-0.67+7.75=(3.25+7.75)+(1.67-0.67)=11+1=12.
重铬酸钾的物质的量=0.02000mol/L*0.021L=4.2*10^-4molCr2O72-+6Fe2++14H+===2Cr3++6Fe3++7H2O164.2*10^-4molXX=2.52
0.40789473684210526315789473684211
①2009^2-18*2009+81=2009^2-2*9*2009+9^2=(2009-9)^2=2000^2=4000000②3.14*8.75^2-3.14*7.75^2=3.14*(8.75^
(80.75/8.5+7.75)*3.7=(80.75+8.5*7.75)*3.7/8.5=(80.75+65.875)*3.7/8.5=146.625*3.7/8.5=146.625/8.5*3.7
10.25-6.15-3.85+7.75=10.25+7.75-(6.15+3.85)=18-10=8
2.25/1.25+7.75*.8=2.25*0.8+7.75*0.8=(2.25+7.75)*0.8=10*0.8=8
=4.6+5.4-(1.25+7.75)=10-9=1
77.5*3.6+7.75*63+7.75=7.75*36+7.75*63+7.75=7.75*(36+63+1)=7.75*100=775
18.5×6.2×0.31=18.5×20×0.31×0.31=370×0.31×0.31=370×0.1961=35.557
第三个数你打错了,应该是0.317.751.550.31(0.062)(0.0124)0.00248规律:除以5
zeropointthirtyone
再答:无限小数
1.55÷3.8=155÷380.0.407------------380︱15501520---------30002660-----------340
计算器算再问:计算器算不成分数再答:先算括号里的再答:我帮你再问:括号里的是分数再答:知道再答:7.75-12/41再问:然后呢?再答:你自己算啊再问:我要得数。。再答:。。。。
sevenpointsevenfiveyuanorsevenyuanseventy-fivecents
原式即3.1*4.5+5.5*3.1即3.1*(4.5+5.5)即3.1*10得31也就是先对于55*0.31,一个数除以10一个数乘以10结果不变然后是乘法分配律.
36.5-8.12-4.13-7.75=36.5-(8.12+4.13+7.75)=36.5-20=16.5