滬教新版七年級上冊《9.4 整式》2018年同步練習(xí)卷
發(fā)布:2025/1/4 19:0:3
一、疑難分析
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1.下列代數(shù)式中哪些是整式?哪些是單項(xiàng)式?哪些是多項(xiàng)式?若是單項(xiàng)式,則說明該單項(xiàng)式的系數(shù)與次數(shù);若是多項(xiàng)式,則說明該多項(xiàng)式的次數(shù).
,2a-5b7,x-yx+y,-33a2b3,2,3x2y-5xy2+y-2x,ab.mn組卷:235引用:2難度:0.9 -
2.把多項(xiàng)式2xy2-
x2y-0.5x3y4+5先按字母y的升冪排列,再按字母x的降冪排列.37組卷:62引用:1難度:0.7
二、基礎(chǔ)訓(xùn)練
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3.在代數(shù)式①-
;②17;③a+b3x2y2;④4x2-2y;⑤23;⑥a;⑦1x-3;⑧ba中單項(xiàng)式有;多項(xiàng)式有.(填序號)x2x組卷:106引用:1難度:0.9 -
4.單項(xiàng)式-
x2y3的系數(shù)是,次數(shù)是.12組卷:166引用:4難度:0.7 -
5.多項(xiàng)式x3-2x2+3x-4是次多項(xiàng)式,一次項(xiàng)的系數(shù)是,常數(shù)項(xiàng)是.
組卷:27引用:1難度:0.7
三、拓展訓(xùn)練
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15.如果x2y-2x3+myn-2-xy3-2y是五次多項(xiàng)式,那么m+n的值是.
組卷:123引用:3難度:0.8 -
16.已知a2x3+ax2-4x3+2x2+x+1是關(guān)于x的二次多項(xiàng)式,求a2+
+a的值.1a2組卷:102引用:1難度:0.8