圆 周 率 背 诵 表=3.14 6=18.84 11=34.54 16=50.242=6.28 7=21.98 12=37.68 17=53.383=9.42 8=25.12 13=40.82 18=56.524=12.56 9=28.26 14=43.96 19=59.665=15.7 10=31.4 15=47.1 20=62.822=4=12.56 32=9=28.26 42=16=50.2452=25=78.5 62=36=113.04 72=49=153.8682=64=200.96 92=81=254.341.52=2.25=7.065 2.52=6.25=19.625 3.52=12.25=38.465 4.52=20.25=63.585