1)(33/55+77/99-1 intreg 17/45)x1994/1995=
=(3/5+7/9-62/45)x1994/1995=
=(27+35-62)/45 x1994/1995=
=0/45 x1994/1995=0
2)(3 intregi 1/4+2 intregi 1/5-3/20):7/20=
=(13/4+11/5-3/20):7/20=
=(65+44-3)/20× 20/7=
=106/7=
=15,(142857)
3)9 intregi 3/25:(7 intregi 1/5-3 intregi 1/10+6 intregi 1/2)=
=228/25:(36/5-31/10+13/2)=
=228/25:(72-31+65/10)=
=228/25:106/10=
=228/5×1/53=
=228/265
4)2/3x(5/2-5/9):4/3=
=2/3x(45-10)/18) ×3/4=
=1/1x35/18 ×1/2=
=35/36
