人教版二年级下册数学第七单元练习题(共3页).doc

精选优质文档-倾情为你奉上二年级下册数学第七单元练习卷一、口算 28 + 58 = 80 28 = 900 + 500 = 46 27= 160 70 = 1700800= 70 26 = 35 27 = 34 + 25 = 320 + 70 = 630600= 590 90 = 900600 = 86 34 = 90 75 =二、笔算450 + 210 570 380 370 + 340 280 160 690 + 230 550 360 240 160 490 230 280 + 540 440 - 380三、用“”画出先算部分，再计算