作业帮3.14x30 2x30 2 3.14x30x2.5中的撇啥意思
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 08:56:30
表示它后面的数是前面数的后面数次方.
1/3*3.14*5*5x=(100+25)*3.14,即1/3*25x=125,故x=5*3=15
（1）21*3.14+62*3.14+17*3.14=3.14（21+62+17）=3.14*100=314（2）758^2=（760-2）^2=760^2-4*760+4=577600-3040+4
3.14*1=3.14*2=6.28*3=9.42*4=12.56*5=15.7*6=18.84*7=21.98*8=25.12*9=28.26*10=31.4
原式=3.14rh(-2r+3h)÷[(1/2)×3.14rh]=2(-2r+3h)=6h-4
1.57
(3.14*7.42+2.58*3.14)/(3.25+3.14-3又1/4)=[3.14*(7.42+2.58)]/(3.25-3.25+3.14)3又1/4就是3.25=3.14*10/3.14=
其实多用的话几个常用的自然会记住,其他的也没必要刻意去记,记了小学之后也会忘的.、
3.146.289.4212.5615.718.8421.9825.1228.2631.434.5437.6840.8243.9647.150.2453.3856.5259.6662.865.9469
①（1/2-5/6+5/12-7/24）×24=12-20+10-7=-5②2×3.14-8×3.14+5×3.14-9×3.14=3.14（2-8+5-9）=3.14*（-10）=-31.4③100
(3.14+2.6)/4
1×3.14＝3.142×3.14＝6.283×3.14＝9.424×3.14＝12.565×3.14＝15.76×3.14＝18.847×3.14＝21.988×3.14＝25.129×3.14＝2
是不是从1乘3.14乘到100乘3.14所有的结果?3.146.289.4212.5615.718.8421.9825.1230.631.434.5437.6840.8243.9647.150.245
3.146.289.4212.5615.718.8421.9825.1230.631.434.5437.6840.8243.9647.150.2453.3856.5259.6662.865.9469.
按顺序1to1003.146.289.4212.5615.718.8421.9825.1228.2631.434.5437.6840.8243.9647.150.2453.3856.5259.6662
1/60+3/60+5/60+…+59/60=90/60=1.5所以,这30个数的平均数为3.14+1.5/30＝3.19
y=4^x在R上是增函数∵3.14>-3.14∴4^3.14>4^-3.14
（1/3×3.14）x75-(1/3x3.14)x25=(1/3x3.14)x(75-25)=(3.14/3)x50=157/3
3.1413.143.1426.283.1439.423.14412.563.14515.73.14618.843.14721.983.14825.123.14928.263.141031.43.14
3.146.289.4212.56再答：15.718.8428.5231.4再问：1到20全部的再答：哦，这是1-10再问：要到20再答：