1) в скобках : 3 7 3*3 - 7*2 9-14 -5
--- - ---- = ------------- = --------- = ------
8 12 24 24 24
5 2 5*3+2*2 15+4 19
--- + ---- = ------------ = ---------- = -----
18 27 54 54 54
2) умножение -5 -5 36 -5*36 -1*6 -6 -3
------ *3,6 = ----- * ------ = --------- = ------------ = ---- = -----
24 24 10 24*10 4*2 4*2 4
19 11 19*27 1 * 1 1
---- : 1 ---- = ----------- = ------------ = ---
54 27 54*38 2 * 2 4
3) сложение -3 1 -3+1 -2 -1
---- + --- = ------- = --- = ---- = -0,5
4 4 4 4 2