... điểma) – 567 – ( – 113) + (– 69 ) – ( 113 – 567 )= – 567 + 113 – 69 – 113 + 567 = (– 567 + 567 ) + ( 113 – 113) – 69 = 69 b) 15. ( 17 – 111) – 17. ( 22 2 + 15)= 15. 17 – 15. 111 – 17. 22 2 – 17. ... 17. 22 2)= 0 – ( 15. 111 + 17. 2. 111)= - 111. ( 15 + 34)= - 111. 49= - 5439 c) 20 11 + { 743 – [ 20 11 – (+ 25 7)]}= 20 11 + [ 743 – ( 20 11 – 25 7)]= 20 11 + 743 – 20 11 + 25 7= ( 20 11 – 20 11) ... + ( 743 + 25 7)= 10001 điểm1,5 điểm1 điểmCâu 2. Tìm x 3 điểma) – 7 + 2x = – 37 – (– 26 ) – 7 + 2x = – 37 + 26 – 7 + 2x = – 112x = – 11 + 72x = – 4x = – 4 : 2 x = 2 Vậy x = 2 b) ( 3x +...