2.7X5.4十4.6X2.7＝2.7X（5.4十4.6）是运用了乘法的（）。一个长方形花坛,长1
\u6709\u4e00\u4e2a\u957f\u65b9\u5f62\u7684\u82b1\u575b\uff0c\u957f\u662f\u5bbd\u76844\u500d\uff0c\u5176\u9762\u79ef\u4e3a25\u33a1\uff0c\u6c42\u8fd9\u4e2a\u957f\u65b9\u5f62\u7684\u957f\u548c\u5bbd\u3002\u6709\u4e00\u4e2a\u957f\u65b9\u5f62\u7684\u82b1\u575b\uff0c\u957f\u662f\u5bbd\u76844\u500d\uff0c\u5176\u9762\u79ef\u4e3a25\u33a1\uff0c\u6c42\u8fd9\u4e2a\u957f\u65b9\u5f62\u7684\u957f\u548c\u5bbd\u3002
\u8bbe\u5bbd\u4e3aX\u7c73\uff0c\u5219\u957f\u4e3a4X\u7c73
\u9762\u79ef=\u957f*\u5bbd
25=4X*X
5*5=2X*2X
2X=5
X=2.5......\u5bbd
4X=10......\u957f
6x^2-7x+1=0
(6x-1)(x-1)=0
x=1/6\u6216x=1
栅栏长：（14.5+5.8）×2=40.6m
（1）乘法分配律
（2）（14.8+5.8）X2=40.6米
是运用了乘法分配律，2*（14.5+5.8）=40.6（m）
绛旓細瑙ｏ細2.7X-0.8=4.6 2.7x=4.6+0.8 2.7x=5.4 x=5.4梅2.7 x=2
绛旓細2.7*0.46+0.27*5.4 锛2.7*0.46+0.27*10*5.4/10 锛2.7*0.46+2.7*0.54 锛2.7*锛0.46+0.54锛夛紳2.7*1 锛2.7
绛旓細绠渚挎柟娉曡绠楀涓嬶細8.8脳2.7+4.4脳4.6 =4.4脳2脳2.7+4.4脳4.6 =4.4脳5.4+4.4脳4.6 =4.4脳(5.4+4.6)=4.4脳10 =44 鍘熺悊鍙婅В鍐崇畝渚胯绠楃殑鏂规硶锛氱畝渚胯绠楁槸涓绉嶇壒娈婄殑璁＄畻锛屽畠杩愮敤浜嗚繍绠楀畾寰嬩笌鏁板瓧鐨勫熀鏈ц川锛屼粠鑰屼娇璁＄畻绠渚匡紝浣夸竴涓緢澶嶆潅鐨勫紡瀛愬彉寰楀緢瀹规槗璁＄畻鍑哄緱鏁般傗憼...
绛旓細鍘熷紡=1.8脳2脳2.3+3.6脳2.7 =3.6脳2.3+3.6脳2.7 =3.6脳锛2.3+2.7锛=3.6脳5 =3.6脳10脳锛1/2锛=18
绛旓細鎶2.3X44鎹㈡垚2.3X2X22灏辨槸4.6X22锛屾墍浠5.4X22+4.6X22=锛5.4+4.6锛塜22=10X22=220
绛旓細4.3x4.6+8.6x2.7 =4.3x4.6+4.3x2x2.7 =4.3x4.6+4.3x5.4 =4.3x锛4.6+5.4锛=4.3x10 =43
绛旓細5脳锛5.4涓x锛夛紳4x锛2 4x锛2鍗5x涓27锛0
绛旓細鍘熷紡=4.3*46+43*2*2.7=43*4.6+43*5.4=43*锛4.6+5.4锛=43*10=430 2鍒嗕箣x+2-3鍒嗕箣x-1=6 瑙ｅ緱x=28 3x+2鍒嗕箣5x-4=4鍒嗕箣5 瑙ｅ緱26/5
绛旓細1.4脳4.6+2.8脳2.7鐨勭畝渚胯绠 =1.4脳4.6+1.4脳5.4 =1.4x锛4.6+5.4锛=1.4x10 =14
绛旓細3.64+4.4*2.7绠渚胯绠楋細鍘熷紡=0.4x锛9.1+11x2.7锛=0.4x锛9.1+29.7锛=0.4x38.8 =0.4x锛40-1.2锛=16-0.48 =15.52
