문제 1선택형112×213=?1\frac12\times2\frac13=?121×231=?12\frac12211121\frac121212122\frac122213123\frac12321
문제 2선택형225×134=?2\frac25\times1\frac34=?252×143=?2152\frac152513153\frac153514154\frac154515155\frac15551
문제 3선택형312×225=?3\frac12\times2\frac25=?321×252=?8258\frac258527257\frac257526256\frac256525255\frac25552
문제 4선택형214×123=?2\frac14\times1\frac23=?241×132=?1341\frac341432342\frac342433343\frac343434344\frac34443