문제 1선택형25×3=?\frac25\times3=?52×3=?1151\frac151511251\frac251521351\frac351531451\frac45154
문제 2선택형78×4=?\frac78\times4=?87×4=?12\frac12211121\frac121212122\frac122213123\frac12321
문제 3선택형56×2=?\frac56\times2=?65×2=?1131\frac131311231\frac231322132\frac132312232\frac23232
문제 4선택형112×3=?1\frac12\times3=?121×3=?1121\frac121212122\frac122213123\frac123214124\frac12421