Odpowiedź:
1/2×1/2=1/4
1/2×1/3=1/6
1/2×3/5=3/10
1/2×5/8=5/16
1/2×2/3=2/6= 1/3
1/2×3/4=3/6= 1/3
1/2×3/8=3/16
1/2×7/10=7/20
2/3×1/2=3/6= 1/2
2/3×2/3=4/6= 2/3
2/3×3/5=6/10= 3/5
2/3×5/8=10/24= 5/12
2/3×1/3=2/6= 1/3
2/3×3/4=6/12= 1/2
2/3×3/8=6/24= 1/4
2/3×2/10=14/30= 7/15
4/5×1/2=4/10= 2/5
4/5×1/3=4/15
4/5×2/3=8/15
4/5×3/4=12/20 = 3/5
4/5×3/5=12/15 = 4/5
4/5×3/8=12/40= 3/10
4/5×5/8=20/40= 1/2
4/5×7/10=28/50= 14/25