Odpowiedź :
=7/2×8/7=4/1=4
=27/5÷27/10=27/5×10/27=2/1=2
=13/3×2/1=13/3×2/1=26/3=8 2/3
=13/3÷2/1=13/3×1/2=13/6=2 1/6
=3/18÷31/10=3/18×10/31=5/4=1 1/4
=7/2×8/7=4/1=4
=27/5÷27/10=27/5×10/27=2/1=2
=13/3×2/1=13/3×2/1=26/3=8 2/3
=13/3÷2/1=13/3×1/2=13/6=2 1/6
=3/18÷31/10=3/18×10/31=5/4=1 1/4