1 23/27 (0.36a+ 3/5) - 1/3 (2a -5/18) + 43/54

3,5763068727108917484380202518754

Выражение: (1.23//27)*(0.36*A+3.5)-1.3*(2*A-5//18)*(43//54) Ответ: -(138643//67500)*A+(5431//12150) Решаем по действиям:1.23=123//100 2. (123//100)/27=(41//900) 3. 0.36=36//100 4. 36//100=9//25 5. 3.5=35//10 6. 35//10=7//2 7. (41//900)*((9//25)*A+(7//2))=(41//2500)*A+(287//1800)  (41//900)*((9//25)*A+(7//2))=(41//900)*(9//25)*A+(41//900)*(7//2) 8. 1.3=13//10 9. (13//10)*(2*A-(5//18))=(13//5)*A-(13//36)  (13//10)*(2*A-(5//18))=(13//10)*2*A-(13//10)*(5//18) 10. ((13//5)*A-(13//36))*(43//54)=(559//270)*A-(559//1944)  ((13//5)*A-(13//36))*(43//54)=(13//5)*A*(43//54)-(13//36)*(43//54) 11. (41//2500)*A+(287//1800)-((559//270)*A-(559//1944))=(41//2500)*A+(287//1800)-(559//270)*A+(559//1944) 12. (41//2500)*A-(559//270)*A=-(138643//67500)*A 13. (287//1800)+(559//1944)=(5431//12150)