bài 1 : tính giá trị biểu thức một cách hợp lý a) 24.(16-5) - 16.(24 -5) b) 29.(19 -13) -19.(29 -13) bài 2: tính giá trị biểu thức sau a) x+8 - x -22 với x = 2020 b) -x - a +12 + a với x = -98 ; a =99 c) a - m + 7 - 8 + m với a =1; m = -123 d) m - 24 - x + 24 + x với x =37 ; m = 72 Mn giúp mik vs mik đang cần gấp, mai phải nạp rồi

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