半径等于三厘米,直径是多少厘米写出过程 一个圆的半径是3厘米,直径是多少米?
\u4e00\u4e2a\u5706\u7684\u534a\u5f84\u662f\u4e09\u5398\u7c73\uff0c\u76f4\u5f84\u662f\u591a\u5c11\u5398\u7c73\uff1f\u4e00\u4e2a\u5706\u7684\u534a\u5f84\u662f\u4e09\u5398\u7c73\uff0c\u76f4\u5f84\u662f3*2=6\u5398\u7c73
\u3000\u3000\u4e00\u4e2a\u5706\u7684\u534a\u5f84\u662f3\u5398\u7c73\uff1b
\u3000\u3000\u76f4\u5f84\u662f\uff080.06\uff09\u7c73\uff1b
\u3000\u30003*2/100
\u3000\u3000=6/100
\u3000\u3000=0.06\uff08\u7c73\uff09
3×2=6(厘米)
绛旓細鐩村緞=鍗婂緞脳2 3脳2=6锛鍘樼背锛
绛旓細涓涓渾鐨勫崐寰勬槸涓夊帢绫筹紝鐩村緞鏄3*2=6鍘樼背
绛旓細鍗婂緞鏄3鍘樼背锛岀洿寰勬槸6鍘樼背 鐩村緞鏄2鍘樼背锛屽崐寰勬槸1鍘樼背 鍗婂緞鏄7.6鍘樼背锛岀洿寰勬槸15.2鍘樼背 鍗婂緞鏄3锛岀洿寰勬槸6 鍗婂緞鏄1, 鐩村緞鏄2
绛旓細杩欎釜鍦嗙殑鐩村緞鏄6鍘樼背.
绛旓細鐩村緞鍜屽崐寰勪笉鏄棤闄愮殑锛鍗婂緞涓轰笁鍘樼背鐩村緞涓6鍘樼背銆
绛旓細鐩村緞=2脳3=6鍘樼背 鍛ㄩ暱=6脳3.14=18.84鍘樼背
绛旓細宸茬煡鍗婂緞鏄笁鍘樼背鐩村緞锛屽懆闀块潰绉灏戯紵鐩村緞=3脳2=6鍘樼背 鍛ㄩ暱=2脳3.14脳3=18.84鍘樼背 闈㈢Н=3.14脳3脳3=28.26骞虫柟鍘樼背
绛旓細鍥犱负鍦嗙殑鍗婂緞鏄3鍘樼背锛鐩村緞鏄6鍘樼背锛屾墍浠ラ暱鍙互鍓36梅6=6涓紝瀹藉彲浠ュ壀18梅6=3涓紝涓鍏卞壀鍑6脳3=18涓
绛旓細鍦嗛敟搴曢潰鍗婂緞 3鍘樼背 r锛3 鐩村緞涓哄叚鍘樼背 d锛6鍘樼背 楂樹负1.2绫 h锛120鍘樼背 鑱旀兂鍦嗛敟琛ㄩ潰绉拰浣撶Н鍏紡锛歏閿ワ紳搴曢潰绉楅珮脳1/3 =1/3sh=1/3*鍏r锛2*h锛1/3*3.14*3锛2*120=3.14*9*120/3=3.14*9*40=1130.1骞虫柟鍘樼背 鍦嗛敟琛ㄩ潰绉叕寮忥細S=蟺r²+蟺rl=3锛2鍏+鍏*3...
绛旓細鍦嗙殑鍛ㄩ暱绛変簬3.14涔樹互鐩村緞銆傜涓涓渾鐨勭洿寰勬槸6鍘樼背锛屽畠鐨勫懆闀挎槸3.14脳6銆傜浜屼釜鍦嗙殑鐩村緞鏄12鍘樼背銆傚畠鐨勫懆闀挎槸3.14脳12銆傛墍浠ヨ繖涓や釜鍦嗙殑銆傚煎懆闀夸箣姣旀槸 3.14脳6锛3.14脳12 锛1:2銆