262
3
2
152
0
2
454
9
2
299
5
2
325
7
2
612
0
2
323
0
1
381
0
1
237
0
1
501
2
1
215
3
1
396
0
1
Didn't find what you're looking for? Try searching on Q&A, too!
Keyword(s): 算数 比例