题型:填空题 题类:常考题 难易度:困难
整十数加、减整十数1041(10题)
29+=30
38+=40
67+=70
72+=80
81+=90
52+=60
12-3= | 6+34= | 25+7= | 47-7= |
36-30= | 44+20= | 90-50= | 100-20= |
4+29= | 15+8= | 13-8= | 60-9= |
25-3= | 3+40= | 34-8= | 24+20= |
试题篮