苏科版数学七年级上册《合并同类项》同步练习1 1页

<合并同类项(2)＞NO:0306班级小组姓名1.与是同类项的是（）A.B.C.D.2.下列各组整式中,不属于同类项的是（）[来源:Z,xx,k.Com]A.与B.与C.1与D与3.合并同类项:[来源:www.shulihua.net][来源:www.shulihua.netwww.shulihua.net](1)a2-3a+5+a2+2a-1(2)-2x3+5x2-0.5x3-4x2-x3[来源:www.shulihua.net](3)5a2-2ab+3b2+ab-3b2-5a2(4)5x3-4x2y+2xy2-3x2y-7xy2-5x3[来源:www.shulihua.net]2、求下列各式的值：[来源:学§科§网](1)6y2-9y+5-y2+4y-5y2，其中[来源:www.shulihua.net(2)3a2+2ab-5a2+b2-2ab+3b2，其中a=-1，[来源:www.shulihua.net][来源:www.shulihua.net](3)＋＋8－5－－(4).－1－－5＋－[来源:www.shulihua.net]5.若关于x、y的两个单项式和可以合并同类项，请求出的值