а) =3/6
=6/10
=8/14
=10/20
=30/150
=70/350
б)
=3/9
=2/14
=18/20
=50/150
=50/350
в)
=5/9
=5/12
=4/18
=11/22
=90/270
=210/420
а) =3/6
=6/10
=8/14
=10/20
=30/150
=70/350
б)
=3/9
=2/14
=18/20
=50/150
=50/350
в)
=5/9
=5/12
=4/18
=11/22
=90/270
=210/420