1 π= 3.142 π= 6.283 π= 9.424 π= 12.565 π= 15.76 π= 18.847 π= 21.988 π= 25.129 π= 28.2610 π= 31.411 π= 34.5412 π= 37.6813 π= 40.8214 π= 43.9615 π= 47.116 π= 50.2417 π= 53.3818 π= 56.5219 π= 59.6620 π= 62.821 π= 65.9422 π= 69.0823
是这样的吗?1π=3.14 2π=6.283π=9.42 4π=12.565π=15.7 6π=18.847π=21.98 8π=25.129π=28.26 10π=31.411π=34.54 12π=37.6813π=40.82 14π=43.9615π=47.1 16π=50.24
1π=3.14 以此类推
1至100兀的得数3.14 6.28 9.42 12.56 15.7 18.84 21.98 25.12 28.26 31.4 34.54 37.68 40.82 43.96 47.1 50.24 53.38 56.52 59.66 62.8 65.94 69.08 72.22 75.36 78.5 81.64 84.78 87.92 91.06 94.2 97.34 100.48 103.62 106.76 109.9 113.04 116.18
3.14 6.28 9.42 12.56 15.7 18.84 21.98 25.12 28.26 31.4 34.54 37.68 40.82 43.96 47.10 50.52 59.66 62.80 65.94 69.08 72.22 75.36 78.50 81.64 84.78 87.92 91.06 94.20 97.34 100.48103.62 106.76 109.90 113.04…………(^_-)
1 π62616964757a686964616fe4b893e5b19e31333332613063= 3.14 2 π= 6.28 3 π= 9.42 4 π= 12.56 5 π= 15.7 6 π= 18.84 7 π= 21.98 8 π= 25.12 9 π= 28.26 10 π= 31.4 11 π= 34.54 12 π= 37.68 13 π= 40.82 14 π= 43.96 15 π= 47.1 16 π= 50.24 17
对于我来说,我是先把这些家伙读到滚瓜烂熟,然后再记起3.14 比如2π就先想2乘3得6 然后就是6.28 然后觉得数多的话就加倍.第二个是多做这类题,慢慢的就会对个别常见的π值熟悉,不过一般来说常见的只有1~10π和2分之1π 16π 36π和 25π
参考来自 http://zhidao.baidu.com/question/90623527.html 以下分别是1~100π 3.14159265358979 6.28318530717959 9.42477796076938 12.5663706143592 15.707963267949 18.8495559215388 21.9911485751286 25.1327412287183 28.
1π≈3.14 2π≈6.28 3π≈9.42 4π≈12.56 5π≈15.76π≈18.84 7π≈21.98 8π≈25.12 9π≈28.26 10π≈31.411π≈34.54 12π≈37.68 13π≈40.82 14π≈43.96 15π≈47.116π≈50.24 17π≈53.38 18π≈56.52 19π≈59.66 20π≈62.821π≈65.94 22π≈69.08 23π≈72.22 24π≈75.36
1兀=3.14,3.14*100=314.所以100兀=314