5 7 5·5 7·6 120+25 42 103
1) (49 --- - 46 ----)= 49 ------- - 46 ----- = 48 ------------ - 46 ------=2-----
24 20 120 120 120 120 120
103 1
2) 2--------:2 ---- =343/120 ·3/7=49/40
120 3
3) 49/40+0,6=(49)/40+(6·4/40)=73/40
4) (73/40)/0,2=(73/40)·(10/2)=73/8=9+1/8= 9,125