整式加減易錯題

1、jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式;21;2;21; xxxxyyxa jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式a 32ab 32bca732ba yx2221 131 3167 543jixishi h

2、engshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式12.1.165.3222222 xyxdbabbacxxbxxa jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式._31)2(_2)1(223325，常數(shù)項是最高次項是項式，次是；，常數(shù)項是最高次項是項式，次是yxxxyyx 四三3xy52四三322yx31jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式3.1.3.3.211.2bafabeadacabbbaajixishi hengshanzhongxue “自主互助自主

3、互助”課堂教學模式課堂教學模式).521( mm,21,mm).523( mjixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式323232)3(xyyx與與22102)2(與與 2232)4(yxyx 與與323222)1(yxba與與jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式;0;212213;123;527;642;523222222532ababxxxabababababxxxaaajixishi h

4、engshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式;233123) 1 (2222yxxyxyyxyx2)233123()1( 解：原式解：原式y(tǒng)x261 223523xyyx )312()233()1(2222xyxyyxyx 解：原式解：原式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式)22()()3()2(22bbbbaaa 解：原式解：原式ba2 .223)2(22bbabbaa)22()()3()2(22bbbbaaa 解解：原原式式24ba jixishi hengshanzhongxue “自主互助自主互

5、助”課堂教學模式課堂教學模式dcbadcba )()1(bacbac 2)(2)2(2343)2(43)3(22 xxxxcbacba )()4(jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式)2(3)22)(2()3()123)(1(222222abbaabbaxxxx 234)1(2 xx原式原式解：解：224)2(abba 原式原式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式2)1(323222xxxx23323222xxxx 解：原式解：原式22223323xxxx 32)233(222

6、xxxx3242 xx化簡：jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式;2)643(31)14(3.1232xxxxx的值，其中求多項式2343123232xxxx解：原式1123523xxx1)2(12)2(35)2(23原式12432083239jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式jixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式; 12, 12322 xxbxxa)12(2)123(222 xxxxba解：解：22412322 xxxx21224322 xxxx1472 xxjixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式2532 xx3422 xx342)253(22xxxxa解：因為)253(34222xxxxa所以25334222 xxxxa23543222 xxxxa12 xxajixishi hengshanzhongxue “自主互助自主互助”課堂教學模式課堂教學模式分鐘元分鐘元分鐘元分鐘元/)51.(/)51.(/)45.(/)45.(mndmncmnbmna,)%