Question

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

Answer 1

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