六年级计算圆的周长和面积

题目

六年级计算圆的周长和面积
1.r=0.2 c= s= 2.r=2 c= s= 3.r=0.1 c= s= 4.r=0.3 c= s=
5.r=10 c= s= 6.r=20 c= s= 7.r=0.1 c= s= 8.r=1 c= s=
9.r=3 c= s= 10.r=0.02 c= s= 11.d=2 c= s= 12.d=0.4 c= s=
13.d=200 c= s= 14.d=0.2 c= s= 15.d=20 c= s= 16.d=0.6 c= s=
17.d=4 c= s= 18.d=40 c= s= 19.d=60 c= s= 20.d=400 c= s=
请尽快

答案

1.r=0.2 c= 1.256 s= 0.1256 2.r=2 c=12.56 s=12.56 3.r=0.1 c=0.628 s=0.0314 4.r=0.3 c=1.884 s=0.2826
5.r=10 c=62.8 s=314 6.r=20 c=125.6 s=1256 7.r=0.1 c=0.628 s=0.0314 8.r=1 c=6.28 s=3.14
9.r=3 c=18.84 s=2826 10.r=0.02 c=0.1256 s=0.001256 11.d=2 c=6.28 s= 3.14 12.d=0.4 c=1.256 s=0.1256
13.d=200 c=628 s=31400 14.d=0.2 c=0.628 s=0.0314 15.d=20 c=62.8 s=314 16.d=0.6 c=1.884 s=0.2826
17.d=4 c=12.56 s=12.56 18.d=40 c=125.6 s=1256 19.d=60 c=188.4 s=2826 20.d=400 c=1256 s=125600 给我加分好不好,给你打得都麻了