1. 6 42\48 -3 16\48 +5 15\48 = 8 (42-16+15) \ 48 = 8 41\48
2. 5 32\60 +4 35\60 - 3 57\60 = 6 (32+35-57)\ 60 = 6 10\60 = 6 1\6
3. (36 16\24 + 3 3\24) - ( 17 9\9 - 10 5\9) = 39 19\ 24 - 7 4\9 = 39 57\72 - 7 32\72 =
32 25\72
4. 20 21\54- 15 45\54 + 9 50\54 =14 (21-15+50)\ 54 = 14 56\50 = 15 6\50 =15 3\25
5. 5 45\70 - 2 30\70 +6 49\70 = 9 (45-30+49) \ 70 = 9 64\70 = 9 32\35