p,7,16,18,19,20,21,22.23.24.25.26.27.29.30.31 .32.33.34.35 .36.37.38.42.43.44.
45.47.49.51.52.56.58.59.64.66.67.68.69
數學訓練營(香港教育圖書公司)小六升中一
p.38.43{11.(b)}.44.45.46.49.50.51.55.56.57.58.62.63.64.65.
有冇好心人幫我?感激不盡
更新1:
就算係一條都好,只要有答案就得,
