7.83hz NE555
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/23 20:13:53
我印象中铜的密度是8.9,铁的密度是7.8所以应该是后者吧
7.49-(0.56+2.49)=7.49-0.56-2.49=7.49-2.49-0.56=5-0.56=4.4421.43-2.17-7.83+8.57=21.43+8.57-2.17-7.83=
8.2+12.17/-8.2+7.83=(8.2-8.2)+(12.17+7.83)=0+20=20
17.83-9.5-7.83-0.5=(17.83-7.83)-(9.5+0.5)=10-10=0
再答: 再答: 再答:
(1)23.75-8.64-3.36=23.75-(8.64+3.36)=23.75-12=11.75 (2)17.83-9.5-7.83-0.5=17.83-7.83-9.5-0.5=(17
1.3.9.10(10+1)*3-93*(1+10)-93*(10+1)-9(1+10)*3-93.7.7.103-7*(7-10)3*7+10-710-7+7*37*(10-7)+310+3*7-7
7.83÷9=3×2.61÷9=3×3×0.87÷9=0.87
2.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.12×5/6–2/9×37.8×5/4+1/48
345.567+78.57+12.34-7.83-128.34+21.43-2.17=(12.34-128.34)-(7.83+2.17)+(78.57+21.43)+345.567=-116-10+
23.75-8.64-3.46=23.75-(8.64+3.46)=23.75-12.1=11.6517.83-9.5-7.83-0.5=(17.83-7.83)-(9.5+0.5)=10-10=0再
分析紫铜的体积是外圆柱的体积减去内部空的体积(外径是CM?mm)按mm计算如下V1=L*D*D*3.1415/4=19.806立方厘米V2=L*(D-1.5)(D-1.5)*3.1415/4=16.2
等下再答: 再答:OK?
等于0.87.再问:竖式再答: