• 1. (2022五上·丹寨期中) 下面各题怎样简便就怎样算

  ①6.54÷0.4÷2.5

  ②18.6÷0.6×2.3

  ③（4.2+1.32）÷0.8

  ④1.25×1.37×8

  ⑤2.5×6.3＋3.7×2.5

  ⑥6.8-2.8÷14