Сложите дроби:
1) 2/3 + 5/6
2) 1/2 + 3/10
3) 11/49 + 6/7
4) 9/16 + 50/100
5) 2/9 + 3/8
6) 5/12 + 4/15
7) 7/34 + 5/51
8) 9/180 + 7/120

2/3+5/6=4/6+5/6=9/6=3/2=1 1/21/2+3/10=5/10+3/10=8/10=4/511/49+6/7=11/49+42/49=53/49=1 4/499/16+50/100=225/400+200/400=425/400=1 25/400=1 1/162/9+3/8=16/82+27/72=43/727/34+5/51=21/102+10/102=31/1029/180+7/120=18/360+21/360=39/360=13/120