杨老师用十点八元买了六千克橘子用一元钱可以买多少千克橘子？（得数保留两位小数） 爸爸打算买六线个苹果和六千克橘子6千克多少钱苹果五元两千克橘...
\u4e70\u516b\u5343\u514b\u82f9\u679c\u548c\u4e5d\u5343\u514b\u6a58\u5b50\u517149\u70b9\u4e94\u5143\u4e70\u540c\u6837\u7684\u516d\u5343\u514b\u82f9\u679c\u548c\u4e09\u5343\u514b\u6a58\u5b50\u517131\u70b9\u4e94\u51431\u5343\u514b\u82f9\u679c\u548c\u6a58\u5b50\u5404\u5143\u82f9\u679c\u4e00\u65a44.5\u5143\uff0c\u6a58\u5b50\u4e00\u65a41.5\u5143
\u8bbe\u82f9\u679c\u4e3ax\u5143\uff0c\u6a58\u5b50\u5473y\u5143
8x+9y=49.5
6x+3y=31.5
\u8054\u7acb\u4e24\u4e2a\u65b9\u7a0b\u7ec4\u6210\u65b9\u7a0b\u7ec4
\u5f97\uff1ax=4.5 y=1.5
\u7b54\uff1a\u82f9\u679c\u4e00\u65a44.5\u5143\uff0c\u6a58\u5b50\u4e00\u65a41.5\u5143
\u6269\u5c55\u8d44\u6599\uff1a
\u6574\u6570\u7684\u9664\u6cd5\u6cd5\u5219
\uff081\uff09\u4ece\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\u8d77\uff0c\u5148\u770b\u9664\u6570\u6709\u51e0\u4f4d\uff0c\u518d\u7528\u9664\u6570\u8bd5\u9664\u88ab\u9664\u6570\u7684\u524d\u51e0\u4f4d\uff0c\u5982\u679c\u5b83\u6bd4\u9664\u6570\u5c0f\uff0c\u518d\u8bd5\u9664\u591a\u4e00\u4f4d\u6570\uff1b
\uff082\uff09\u9664\u5230\u88ab\u9664\u6570\u7684\u54ea\u4e00\u4f4d\uff0c\u5c31\u5728\u90a3\u4e00\u4f4d\u4e0a\u9762\u5199\u4e0a\u5546\uff1b
\uff083\uff09\u6bcf\u6b21\u9664\u540e\u4f59\u4e0b\u7684\u6570\u5fc5\u987b\u6bd4\u9664\u6570\u5c0f\u3002
\u89e3\u51b3\u8fd9\u7c7b\u95ee\u9898\u7684\u65b9\u6cd5\uff1a
\uff081\uff09\u8ba4\u771f\u5ba1\u9898\uff0c\u5f04\u6e05\u9898\u610f\uff0c\u627e\u51fa\u672a\u77e5\u91cf\uff0c\u8bbe\u4e3a\u672a\u77e5\u6570\u3002
\uff082\uff09\u627e\u51fa\u9898\u4e2d\u7684\u7b49\u91cf\u5173\u7cfb\uff0c\u5217\u51fa\u65b9\u7a0b\u3002
\uff083\uff09\u6b63\u786e\u89e3\u65b9\u7a0b\u3002
\uff084\uff09\u68c0\u9a8c\u3002
6\u00f72\u00d75+6\u00f73\u00d710
=3\u00d75+2\u00d710
=15+20
=35\uff08\u5143\uff09
\u7b54\uff1a\u4e00\u5171\u898135\u5143\u3002
6÷10.8×1=0.555……≈0.56（元）
图
6÷10.8≈0.56千克/元
绛旓細濡堝鐢50鍏冧拱浜嗗叚鍗冨厠钁¤悇锛屾壘鍥鍏厓鎵浠ュ钩鍧囨瘡鍗冨厠钁¤悇 锛50-8锛壝6=7鍏冦
绛旓細灏忛锛96/5梅6=16/5=3.2鍏/鍗冨厠 灏忓己锛124/5梅8=3.1鍏/鍗冨厠 3.2-3.1=0.1鍏 鎵浠ワ紝灏忓己涔扮殑棣欒晧姣旇緝渚垮疁锛屼究瀹0.1鍏/鍗冨厠
绛旓細鑻规灉姣忓崈鍏5/2鍏冿紝姗樺瓙姣鍗冨厠10/3鍏冦6脳5/2+6脳10/3 =15+20 =35 涓鍏辫35鍏冦
绛旓細24/(10-6)=24/4 =6鍏/鍗冨厠 ^__^鐪熷績绁濅綘瀛︿範杩涙锛屽鏋滀綘瀵硅繖涓瓟妗堟湁浠涔堢枒闂紝璇疯拷闂紝鍙﹀濡傛灉浣犺寰楁垜鐨勫洖绛斿浣犳湁鎵甯姪锛岃鍗冧竾鍒繕璁伴噰绾冲摕锛
绛旓細6梅2脳5+6梅3脳10 =3脳5+2脳10 =15+20 =35锛堝厓锛夌瓟锛氫竴鍏辫35鍏冦
绛旓細8+12=20锛堝厓锛 6x8=48锛堝厓锛 12 x6 =72 48 +72 =120
绛旓細1. 棣栧厛锛屾垜浠渶瑕佽绠楄嫻鏋滅殑鍗曚环銆傛牴鎹鐩俊鎭紝濡堝涔颁簡鍏崈鍏鑻规灉鍜鍏崈鍏鏈ㄧ摐锛屾诲叡鑺辫垂浜312鍏冦傚凡鐭ヤ簲鍗冨厠鑻规灉鐨勪环鏍肩瓑浜庝簩鍗冨厠鏈ㄧ摐鐨勪环鏍笺傛垜浠彲浠ヨ鑻规灉鐨勫崟浠蜂负x鍏/鍗冨厠锛屾湪鐡滅殑鍗曚环涓簓鍏/鍗冨厠銆傞偅涔堬紝鏍规嵁棰樼洰淇℃伅锛屾垜浠彲浠ュ緱鍒颁互涓嬫柟绋嬶細6x + 8y = 312 2. 鎺ヤ笅鏉ワ紝鎴戜滑鐭ラ亾浜斿崈鍏嬭嫻鏋滅殑...
绛旓細璁炬瘡鍗冨厠鑻规灉x鍏 6x+0.8=20 6x=20-0.8 6x=19.2 x=3.2
绛旓細绠楀紡灏辨槸3脳20銆
绛旓細濡傛灉鍐欎簡浜屽厓涓娆℃柟绋嬬粍锛岀敤浜屽厓涓娆℃柟绋嬬粍姹傝В锛屾瘮杈冪畝鍗曪紝濡傛灉娌℃湁璁句簩鍏冧竴娆℃柟绋嬬粍锛屾垜鍙互鏁欎綘涓涓瘮杈冪畝鍗曠殑鏂规硶锛屾瘮濡傝锛屼綘涔5鍗冨厠鑻规灉鍜鍏崈鍏嬫瀛鍏27鍏冿紝閭ｄ箞鎴戜滑鎶婂畠缈讳釜鍊嶏紝灏辨槸涔10鍗冨厠鑻规灉鍜12鍗冨厠姗樺瓙锛屽氨鏄54鍏冦傚湪鐪嬪彟澶栦竴涓潯浠讹紝涔10鍗冨厠鑻规灉鍜5鍗冨厠姗樺瓙鍏40鍏冦傝繖閲屽浜7鍗冨厠...
