Ответ:

Пошаговое объяснение:

199/8+49/6=597/23+196/24=793/24= 33 1/24

197/21+67/14=1182/126+603/126=1785/126=14 21/126=14 1/6

58/15+67/10=116/30+201/30=317/30=10 17/30

77/9+31/4+151/12=308/36+279/36+453/36=1040/36=28 32/36=28 8/9

2. 1/4+7/3=3/12+28/12=31/12; 19/5+3/5=22/5; 31/12+3/5=155/60+36/60=191/60=3 11/60

24/5+3/4=96/20+15/20=111/20=5 11/20; 4/3+2/3=6/3=2; 2+5 11/20=7 11/20;

3/4+36/7=21/28+144/28=165/28=5 25/28; 1+3+5 25/28=9 25/28