5 8 5 8 13 4
а) 4 --- +2 ---- = 6 + ---- + ---- = 6+ ---- = 7 ----
9 9 9 9 9 9
1 6 14 6 8
б) 5 ----- - 3 ------ = 4-3 + ------ - ---- = 1-------
13 13 13 13 13
2 7 12 2 8 12 14 8 6 2
в) 7 ---- - (4-3 ----- )+ 2 ---- =7 ----- - ----- +2 ---- =9---- - ---- = 9 --- = 9-- =9,4
15 15 15 15 15 15 15 15 15 5