2 x 兀/2 x 3.14,这个里面兀=3.14所以2 x 兀/2 x 3.14= 2 x 3.14/2 x 3.14=3.14 + 3.14=6.18这题的结果是6.18,采纳我哦
是单项式系数是π分之2 未知数是x
2x乘3.14÷2+2x =3.14x+2x =5.14x
2x+3.14x=(2+3.14)x=5.14x
2x3.14x6x1/4=9.42
2x3.14x35+100x2=2*35*3.14+200=70*3.14+200=219.8+200=419.8
2x3.14x8+3.14x8x8=(2+8)x3.14x8=10x3.14x8=251.2
2*3.14/360意思是:2乘以3.14再除以360约等于0.0174
3.14X=10.28÷2解:3.14X=5.14 X=5.14÷3.14 X=1.637(取3位数)希望你能采纳.
2x3.14x20x30/60;=6.28x20x1/2;=6.28x10;=62.8