Ответ:
Пошаговое объяснение:
1/2+3/2=4/2=2
4/5+1/5=5/5=1
3/15+4/15=7/15
4/5+3/15=12/15+3/15=15/15=1
4/12+7/3=1/3+7/13= 8/3= 2 2/3
3/6+1/7=1/2+1/7=7/14+2/14=9/14
5/9+2/8= 5/9+1/4= 20/36+9/36=29/36
6/36+3/42= 1/6+3/42= 7/42+3/42= 10/42= 4/21
5/30+7/20= 10/60+21/60= 31/60
25/35+18/75= 375/525+126/525=501/525
2/100+3/500= 10/500+3/500=13/500