Question

решите пример13/15*2 1/2-3/4*2 1/2+1/12*2 1/2

Answer 1

=13/15*5/2-3/4*5/2+1/12*5/2=5/2(13/15-3/4+1/12)=5/2(52/60-45/60+5/60)=5/2*1/5=1