16×23= \frac{1}{6}\times\frac{2}{3}= 61×32=
19 \frac{1}{9} 91
29 \frac{2}{9} 92
25×12= \frac{2}{5}\times\frac{1}{2}= 52×21=
25 \frac{2}{5} 52
15 \frac{1}{5} 51
24×45= \frac{2}{4}\times\frac{4}{5}= 42×54=
23×14= \frac{2}{3}\times\frac{1}{4}= 32×41=
14 \frac{1}{4} 41
16 \frac{1}{6} 61
24×12= \frac{2}{4}\times\frac{1}{2}= 42×21=
12 \frac{1}{2} 21
23×34= \frac{2}{3}\times\frac{3}{4}= 32×43=
68×56= \frac{6}{8}\times\frac{5}{6}= 86×65=
58 \frac{5}{8} 85
1148 \frac{11}{48} 4811