9. Te ştiu perseverent. Dovedeşte efectuând calculele: a) 570-(170-11-2)+23-22 => e) 13-(4950-99-50)+15-7= 370-130+17-3-(13-5+15))-19-18- b) 9-13-(495-3950-0-39-101- d) 48-5-12-18-9-54-(24-8-32-6-11- ) 21-6-(156-12-13-5- h) 28-7+14-3+2-154-2-26-4-1)* 1) (1028-4-784-5)-2-19-20- = 2) 13-7-(34-3-24-4)-15=> 1) (195-12-27-19-207-8)-2-17-3= ) 320-15-16-11800-(18-12-36-6)+9-7]​