сложить дроби1/4+2/3;3/5+1/2;1/2+1/7;2/7+2/3;1/5+5/6;2/5+1/4

1/4+2/3=3/12+8/12=11/123/5+1/2=6/10+5/10=11/10=1 1/101/2+1/7=7/14+2/14=9/142/7+2/3=6/21+14/21=20/211/5+5/6=6/30+25/30=31/30=1 1/302/5+1/4=8/20+5/20=13/20