Tính nhanh: [(-59) + 71] - [-83 - (-95)]
Tính nhanh: [(–59) + 71] – [–83 – (–95)].
[(–59) + 71] – [–83 – (–95)]
= (71 – 59) – (–83 + 95)
= 12 – 12
= 0.