Question

найдите разность
7/12-1/4,11/14-2/7,19/21-3/7,3/4-5/28

Answer 1

=7/12-3/12=4/12=1/3;
=11/14-4/14=7/14=1/2;
=19/21-9/21=10/21;
=21/28-5/28=16/28=4/7