單項式乘以單項式、單項式乘以多項式練習(xí)題

1、115.1.4單項式與單項式相乘一、選擇題1.計算的結(jié)果是（）2322)(xyyx??A.B.C.D.105yx84yx85yx?126yx2.計算結(jié)果為（）)()41()21(22232yxyxyx????A.B.0C.D.36163yx?36yx?36125yx?3.計算結(jié)果是（）2233)108.0()105.2(????A.B.C.D.13106?13106??13102?14104.計算的結(jié)果為（）22232)3(2)(bab

2、aba????A.B.C.D.3617ba?3618ba?3617ba3618ba5.x的m次方的5倍與的7倍的積為（）2xA.B.C.D.mx212mx235235?mx212?mx6.，則（）992213yxyxyxnnmm????????nm34A.8B.9C.10D.無法確定7.計算的結(jié)果是（）))(32()3(32mnmyyxx?????A.B.C.D.mnmyx43mmyx22311??nmmyx???232nmyx???5

3、)(3118.下列計算錯誤的是（）A.B.122332)()(aaa???743222)()(babaab????C.D.212218)3()2(?????nnnnyxyxxy333222))()((zyxzxyzxy?????二、填空題：1..___________))((22?xaax2.3522)_)((_________yxyx??3..__________)()()3(343??????yxyx4.._____________

4、)21(622???abcba5.._____________)(4)3(523232????baba3單項式與多項式相乘一、選擇題1化簡的結(jié)果是（）2(21)(2)xxxx???ABCD3xx??3xx?21x??31x?2化簡的結(jié)果是（）()()()abcbcacab?????ABCD222abbcac??22abbc?2ab2bc?3如圖14－2是L形鋼條截面，它的面積為（）AacbcBac(bc)cC(ac)c(bc)cDab2

5、c(ac)(bc)4下列各式中計算錯誤的是（）AB3422(231)462xxxxxx??????232(1)bbbbbb?????CD231(22)2xxxx?????342232(31)2323xxxxxx?????5的結(jié)果為（）2211(6)(6)23abababab????AB2236ab3222536abab?CD2332223236ababab???232236abab??二、填空題1。22(3)(21)xxx?????2。

6、321(248)()2xxx??????3。222(1)3(1)abababab?????4。2232(3)(23)3(25)xxxxxx???????5。228(34)(3)mmmmm?????6。7(21)3(41)2(3)1xxxxxx???????7。22223(2)()abababa????8。223263()(2)2(1)xxyxxy???????9當(dāng)t＝1時，代數(shù)式的值為。322[23(22)]ttttt???10若，則代