请教小学数学问题，求高手解答，要有详细步骤哦~
\u8bf7\u6559\u5c0f\u5b66\u6570\u5b66\u95ee\u9898\uff0c\u6c42\u9ad8\u624b\u89e3\u7b54\uff0c\u8981\u6709\u8be6\u7ec6\u6b65\u9aa4\u54e6~2x6:5x3=12:15=4:5
\u82f9\u679c18x4/(4+5)=8\u5143
\u68a818-8=10\u5143
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\u8bda\u5fc3\u4e3a\u60a8\u89e3\u7b54\u6bcf\u4e00\u4e2a\u95ee\u9898\uff01
\u5982\u60a8\u6ee1\u610f\u8bf7\u91c7\u7eb3\u6700\u4f73\uff01\u5982\u6709\u7591\u95ee\u8bf7\u7ee7\u7eed\u8ffd\u95ee\uff01
\u60a8\u7684\u597d\u8bc4\u662f\u6211\u4eec\u524d\u8fdb\u7684\u52a8\u529b\uff0c\u76f8\u4e92\u5e2e\u52a9\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01
\u246010\u5f20A4\u7eb8\u53e0\u8d77\u6765\u662f1\u6beb\u7c73\uff0c\u90a3\u4e48\u53e0\u8d771\u7c73\u9700\u89811\u4e07\u5f20\u3002\u90a3\u4e48\u6c421\u4ebf\u5f20A4\u7eb8\u53e0\u8d77\u6765\u7684\u9ad8\u5ea6\uff0c\u75281\u4ebf\u9664\u4ee51\u4e07\u5f971\u4e07\u3002\u53731\u4ebf\u5f20A4\u7eb8\u53e0\u8d77\u6765\u662f1\u4e07\u7c73\u3002
\u2461\u5df2\u77e51\u4ebf\u5f20A4\u7eb8\u53e0\u8d77\u6765\u662f1\u4e07\u7c73\uff0c\u90a3\u4e48\u5176\u4e0e\u73e0\u5cf0\u7684\u9ad8\u5ea6\u5dee\uff1a10000-8848.43=1151.57\uff08\u7c73\uff09
OK\uff0c\u89e3\u7b54\u5b8c\u6bd5\u3002\u91c7\u7eb3\u5427~~~\u91c7\u7eb3\u5427~~~\u91c7\u7eb3\u5427~~~
d=2r , r=d÷2=10÷2=5cm
圆的周长：C=2πr=πd=10π
圆的面积 : S=πr²=π×5×5=25π
绛旓細瑙ｏ細1.2x=2.4+1.2 瑙ｏ細0.7x+30=37 2x=4.8 1.2x=3.6 0.7x=37-30 x=4.8梅2 x=3.6梅1.2 x=7梅0.7 x=2.4 x=3 x=10
绛旓細3+x=5.4 瑙ｏ細x=5.4-3 x=2.4 x-6=7.6 瑙ｏ細x=7.6+6 x=13.6 0.2x=6 瑙ｏ細x=6梅0.2 x=30 x梅5=15 瑙ｏ細x=15脳5 x=75
绛旓細1.锛1锛9X-1.8=5.4锛屽皢-1.8绉诲姩鍒版柟绋嬬殑鍙宠竟锛岀浉鍔犵瓑浜7.2锛屽洜涓哄乏杈逛负9X锛屾墍浠ョ敤7.2闄や互9X寰楀埌0.8杩欏氨鏄垜鐨勮В棰樿繃绋 锛2锛夊厛灏4/5X+6/5X寰楀埌2X锛屽洜涓哄彸杈规槸25锛岃鎯冲緱鍒癤鐨勫硷紝灏卞簲璇ュ皢25闄や互2锛屽緱鍒12.5锛岃繖鏄垜鐨勮В棰樿繃绋嬨2.锛1锛夎В璁撅紝鍟嗗簵涓鍏辫繘浜哫绠辨瀛愶紝閭ｄ箞鏂圭▼濡備笅...
绛旓細3銆佷拱涓夐佷竴锛3+1=4锛堢摱锛2鍏4瑙=24瑙 24脳3=72锛堣锛72梅4=18锛堣锛24-18=6锛堣锛夌瓟锛氭瘡鐡朵究瀹6瑙掋4銆佹鏂瑰舰闈㈢Н涓400骞虫柟绫筹紝鍒欏畠鐨勮竟闀夸负20绫 鍥犱负20脳20=400锛堝钩鏂圭背锛変竴缁勫杈瑰鍔犲埌28绫筹紝鍒28脳20=560锛堝钩鏂圭背锛560-400=160锛堝钩鏂圭背锛夌瓟锛氭墿澶у悗闈㈢Н涓560骞虫柟绫筹紝澧炲姞浜16...
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绛旓細1銆40 2銆佸2浜猴紝浜烘暟灏辨槸5鐨勫嶆暟 5鐨勫嶆暟涓紝澶т簬100鐨勮嚦灏戞槸5脳21=105 鎵浠ヨ繖浜涘鐢熸渶灏戞湁105-2=103浜 3銆96鍜72鐨勬渶澶у叕绾︽暟鏄24锛屾墍浠ユ渶澶氳兘鍋24鏉熻姳 96/24=4锛72/24=3锛屾墍浠ユ瘡鏉熻姳閲岀孩鑺辨补4鏈碉紝榛勮姳鏈3鏈
绛旓細浜旓細鍦嗙殑鍛ㄩ暱绛変簬鍦嗗懆鐜囦箻浠ョ洿寰勶紝鎵浠ョ敱鍛ㄩ暱鍙緱鍑虹洿寰 = 62.8/3.14 = 20绫 鍗婂緞涓20/2 =10绫 鍦嗙殑闈㈢Н绛変簬鍦嗗懆鐜囦箻浠ュ崐寰勭殑骞虫柟锛屾墍浠ラ潰绉负锛3.14*10*10 =314骞虫柟绫 鎷撳睍缁冧範锛氱敱棰樻剰鍙煡 x+1=y 鍐嶇敱绠楀紡鍙互寰楀嚭 5X<76<5*锛圶+1锛 寰楀嚭X=15锛孻=16 ...
绛旓細瑙ｏ細鍦嗘煴鐨勪綋绉叕寮忔槸V=sh锛屾崲涓娉曞氨鏄疺=蟺锛坉梅2锛²脳h銆備袱涓渾鏌辩殑搴曢潰鐩村緞鐩哥瓑锛岃鏄庡簳闈㈢Н涔熸槸鐩哥瓑鐨勶紝绗竴涓渾鏌变笌绗簩涓渾鏌辩殑楂樼殑姣旀槸2:3锛屽氨鏄濡傛灉绗竴涓渾鏌辩殑楂樻槸2锛岀浜屼釜鍦嗘煴鐨勯珮灏辨槸瀹冪殑1.5鍊嶏紝涔熷氨鏄3銆傞偅鐜板湪搴曢潰绉浉绛変簡锛岀浜屼釜鍦嗘煴鐨勪綋绉槸180cm³...
绛旓細1.90*80%=72锛堜汉锛90-72=18锛堜汉锛夊コ闃熷憳72浜猴紝鐢烽槦鍛18浜恒2.250/锛1+25%锛=200锛堝厓锛
绛旓細1銆侊紙14脳14-10脳10锛壝椻垙=96鈭廲m²=301.44cm²锛2銆佸崐寰=3梅2=1.5cm锛岄槾褰遍潰绉=1.5脳1.5脳3.14-0.8脳0.8=7.065-0.64=6.425cm²
