《2.图形中的规律》（课件）-2023-2024学年五年级上册数学北师大版

目 录 上 页 下 页 退 出 图 形 中 的 规 律 你最多能摆出几个大小一样的三角形？ 连着摆 摆10个三角形需要多少根小棒? 独3 独1 公共 … … … … … … … … … 连着摆 三角形个数 摆成的图形 小棒根数 算式 1 3 3 2 5 3+2=5 3 7 3+2×2=7 4 9 3+3×2=9 10 21 3+9×2=21 n 3+(n-1) ×2 … 第一个三角形的根数 3+2+2=7 3+2+2+2=9 … 独3 独1 公共 连着摆 1+2×2 1+3×2 1+4×2 1+5×2 1+10×2 1+n×2 独3 独1 公共 连着摆 独3 独1 重叠 舞台上有15只小熊表演节目，数一数一共有多少条腿? 连着摆正方形又有什么规律? 连着摆正五边形又有什么规律? 独1 … … … … … 再 见 目 录 上 页 下 页 退 出 The Sounds Of Silence www.e968.net -Silence, track 2 223622.17 [ti:The Sound of silence - ����������] [ar:] [al:����������] [by:] [00:00.00]The Sound of silence - ���������� [00:02.84]hello darkness my old friend [00:07.74]i've come to talk with you again [00:11.89]because a vision softly creeping [00:16.14]left its seeds while i was sleeping [00:20.77]and the vision that was planted [00:25.38]in my brain still remains [00:30.86]within the sound of silence [00:37.32]in restless dreams i walked along [00:41.10]narrow streets of cobble stone [00:45.36]beneath the halo of a street lamp [00:50.55]i turned my collar to the cold and damp [00:55.07]when my eyes were stabbed [00:58.11]by the flash of a neon light [01:01.83]that split the light [01:04.82]and touched the sound of silence [01:10.88]and in the naked light i saw [01:15.23]ten thousand people maybe more [01:20.22]people talking without speaking [01:24.81]people hearing without listening [01:29.19]people writing songs that voices never share [01:36.95]and no one dare [01:40.16]disturb the sound of silence [01:45.89]"fool" said i,"you do not know [01:50.90]silence like a cancer grows [01:54.91]hear my words that i might teach you [02:00.06]take my arms that i might reach you" [02:04.54]but my words like silent raindrops fell [02:11.71]and echoed in the walls of silence [02:21.91]and the people bowed and prayed [02:25.77]to the neon god they made [02:30.21